Looking from the mod making perspective. Everything you wrote seems to be possible, but it is a lot of work and it will require you to learn many aspects of working with the Creation Kit.

At minimum, you'd need:

Creating a worldspace and several interior cells

NPC creation

Quest design, including dialogue

Packages

Papyrus scripting, both for the quests and for the effects you mentioned

Additionally, you might look into incorporating armors and animations. For these you might look into other mods that could support these like OAR instead of building it from the ground up.

I would advice you to try to start with some smaller projects as a training exercise before doing the full mod.

For example, make a small mod that allow the player to do some tavern work in a vanilla inn, or make a standalone player home. This way you can try out how it works and can learn good habits. You will make plenty of mistakes, but it doesn't matter because you'll learn to avoid them for the full mod. And once you've started on your full mod idea you can just use the good stuff from your smaller project and get a much smoother working final mod.

As a bonus you'll learn which aspects of mod making you enjoy and which you don't, so you can lean in that for you final mod.

As a general advice, keep plenty of notes. Make a file somewhere where you write down ideas (not necessarily fully fleshed out, just so you don't forget), a file with more refined plans, a file where you write down explanations how things work (I often had to go back and check exactly how to make custom NPC faces. Good notes mean you don't have to figure things out a second or third time.), a file where you keep track of things you've been working on (very useful if you didn't have time to mod for a week and come back).

A few thoughts about the quest writing:

You are planning a lot of optional content. This is nice for players as they can select the experience they want, but it needs a good plan in advance to make sure all the parts still fit together nicely.

You also need to think about which hard dependencies and which soft dependencies you want for your mod. Hard dependencies are generally easier to implement, but you might lose some of that flexibility. Soft dependencies are a bit trickier to implement, but they allow more options for the players. Mods like PO3, OAR, ... can be included with little problem as most people already have them.

As a resource, I highly recommend the Creation Kit Wiki, both for the many good starting tutorials as the advanced descriptions for basically every part of the Creation Kit (small note here, sometimes the wiki says that a certain function requires version 1.6, this refers to the original skyrim LE, all those options are available in skyrim SE.)

Hope my ramblings are a bit useful for you, good luck with your modding.

9 hours ago, a_random_user said:

Hope my ramblings are a bit useful for you, good luck with your modding.

They are indeed very helpful, especially the advice for getting started with making the mod itself and the dependencies talk.

I did have some plans for starting small, essentially all the features that I want to have part of this mod I want to make into standalone mods first so that I can try to form my hand at making stuff first but this would also have the added bonus of making the quest mod modular in a way? Pretty much the stuff i have in Prerequisites can be considered stand-alone stuff.

The "take notes" idea is a very nice one. I'll start an obsidian vault for this project and release it to the public once I'm done with it as a resource. Hopefully others can make use of it 

As for the dependencies, I would honestly like to just have close to 0, with only very few and extremely common ones as being required (SexLab and OAR, maybe SlaveTats?). Other things like Devious Devices seem a bit too bloated for my use case, so for that I'd rather just implement a basic bondage mod. Although this is a thing that will be growing / shrinking as I get to actually making the mod itself.
Oh yeah, forgot to mention here: I want to use as little papyrus as possible. I'd rather have SKSE .dlls wherever possible since I care about performance a lot here.

For the questing, you have a very strong point there. Coherence should be the goal even if all side content is skipped. I will have to nail down the main plot, I think, first before I can work on the side content more. Perhaps I could use the optional stuff as lore for the whole island, how it came to be and stuff like that. 


Anyway, thanks so much for bothering to reply to my crazy idea, love your feedback and will take it all into consideration going forward.

Barbarous continent for Fallout 4 sounds very similar in terms of what your looking at trying to do.  (ill post the link at the end of the message so you can look)

Im not a technical creation kit modder, but i do like to dabble in writing so ill add my 2 cents on that side.

Anyways like random said writing wise its best to set a basic framework for a foundation and you can add in details to enhance it, otherwise it just becomes a jumbled mess every time you add something.  Start with deciding "what is the goal" of the story, what is the player trying to achieve, looking at what you wrote its to discover how, why, and possibly stop women disappearing.  Next is your opening, which once again i think you have a good handle on with the 3 ways to start.  The middle is where people tend to lose focus and go off in random directions, my suggestion is to start with one fetish or route and get quests or stuff done that leads to your end goal, that way you have coherent story first.  Once you get that route and ending done or stable then you go back and add other routes or fetishes and fit them within that story you just did.  Otherwise its like trying to tie 50 strings together all at once when its easier to tie one or two together at a time that add up to 50.

barbarous continent lost its focus like i described but is still solid enough, has some interesting fetish ideas in it (you might have to look through the forum for the whole event list as its mod description doesnt do all its events justice and i havent played FO4 in over 3 years so i dont remember much lol)

https://www.loverslab.com/topic/131391-beta-barbarous-continent/

also, join some discords there are a lot of very helpful technical people who are willing to answer questions for those learning.  Modharbour is a very good one with all around technical stuff, Shadowman2777 Mods is good for AI voice stuff and some animation help, Melodic's Den is good for clothing conversion help, and to a lesser extent Buxom Wench Yuriana discord can offer you technical help too though youd probably get better help at modharbour as outside of koz the rest of us just dabble

What I notice, is that mindwise, you are already deep in the flow of events. Might be worthwhile to take a step back and take a look at the location. Lots of mods and especially LL mods suffer from ok to great gameplay, but crappy locations. If the location/the NPC's look bad (and nowadays, I tend to lump 'vanilla look' into the 'looking bad' category), the acceptance will suffer, game play alone won't cut it as the first impression will be ... not positive and as we all know, you only get a single chance on a good first impression.

So I would first try to build a great location (or find one/several with open permissions that you can use/cobble together). That will be your foundation to build a good gameplay on. It's tempting to start with the 1st floor, but unwise to do so until the foundation is done. ^^ 
You don't need to create all locations from the start (like the Dwemer ruin), but the basics should be there and should be looking good enough to fit in a modern modded Skyrim.

Greetings friend, so about your mod, I read the manga/doujinshi you mentioned called Slave City, and after reading everything you wrote, I'll make some topics to keep things more organized:

1 - One thing I recommend, and I believe you thought of this when you wrote ( Hold on, were you a slave before? We already have your papers here, dumb slut. To think you'd return willingly ), I always hope for the possibility of returning to that place whenever I want, whether through simple slavery, dialogue, or whatever, but that the possibility exists. I recommend always maintaining these return options and variations in dialogue, as you described.

2 - I believe there shouldn't be endings, but rather escape routes. For example, the protagonist realizes the operation is too big to handle (remember, Skyrim is also a role-playing game, and not everyone wants to be the Dragonborn; sometimes they just want to be a normal adventurer), so she thinks of ways to escape. This not only keeps the mod in a sandbox style, but also allows the protagonist to return involuntarily (dialogues that explicitly show her resistance to that place, and she only returned due to external consequences, a.k.a. simple slavery or another event) or voluntarily (the protagonist is mentally corrupted and loves sex, is there due to simple slavery or another event, or returned voluntarily).

3 - I suggest using the other female characters in the game and giving them unique dialogue options. There could be events or quests where female NPCs and followers (Serana, Carlotta, Aela, Jordis, Lydia, etc.) are kidnapped and forced to live as slaves. I suggest this because I always notice sex mods that never use in-game NPCs who are beautiful thanks to other mods like NPC replacers. Imagine all the important female NPCs, like the ones I mentioned above, living as sex slaves for the Chaurus, like living as breeding livestock.

This is EXTREMELY ambitious, especially for a first mod.

I'm not saying you shouldn't do it, but holy smokes I don't think you fully understand what you're in for with this.

If you really want to do this, then the most important thing to remember is to BE PATIENT WITH YOURSELF. Learning takes time, and you WILL NOT have a good solution to every problem you face right away.

Don't try to make everything at once. Focus on one "chunk" at a time, even if the chunk seems small.

For something of this magnitude, don't be afraid to completely start over as you get better at modding and learn new techniques. It's better to go back and fix something you realize is done poorly after learning something new rather than releasing something barely functional.

I learned a lot about how CK works over the last two years, and had a lot of struggles along the way, and my mods have been arguably far less ambitious than this. So please, please, please, don't be hard on yourself when things inevitably don't work the way you hoped or can't be implemented as easily as you thought. Because trust me, that WILL happen.