I think I can Make awesome porn games but portraying them as I really want them to be is hard even with ai.
Any fetish content? Niche specific? Any idea? I need You guys To help me.
Not the right mindset, do you know what most cult classics have in common? They were made by passionate devs who loved what they were doing and were deeply invested in it. Simply make it your way, put your fetishes and the stuff you like in it, don't let anyone else tell you what to do, even if their criticisms are valid, follow your heart, or at least follow your dick and don't change anything about what you're doing unless you want to because you think it'd be better from your own perspective.
Do you want to make an ultra realistic story? That's super rare in this space, it really is. Which means if you do it right you might be one of the pioneers of a currently rare niche, you might be leading the way towards ultra realistic porn games as one of the first to make one. Which means asking us for advice is counterproductive, at least as far as content goes.
Everyone has different fetishes, you can't please everyone, some people love feet, some people hate them, some people have a thing for armpits of all things... Whatever floats their boat.
My point is,
don't make our game, make yours.
By the sound of it you want to create a realistic dating sim, which might potentially be releasable on steam, I've played a few good dating sims, they are rare, but the good ones are really good! It sounds like you want to make something like true love (really old dating sim).
Focus on what you're good at, make what you really want to make.
Luckily renpy is easy as hell to learn, just follow the tutorial, you can use LLMs to help you with the coding when if you are gonna make something more complex than a run of the mill VN, but I advise caution, they're not all they're cracked up to be coding wise. I use them a bit like google, get an example of how something could be done, then re-do it better my own way.
But for a standard ren'py vn you won't need any of that shit, but you will need images, so I guess learn how to do image gen. stable diffusion webui and civitai are a great place to start, comfyui is usually where people end up (but it's more complicated than sdwebui).
You could also go the Daz3D route, it will if done right net you higher quality images than ai gen most likely.