First, thanks for your moderating so far Triple! I think you've done a great job so far.
I've also wondered this question about Hentai vs Realistic. I was unsure when I posted the first realistic post if this was the right community for it, or if it was just for hentai. Personally I don't mind if they are mixed (since I think both are cool), but I am willing to move elsewhere if that's what the community wants. For instance, we already have an AIGen Futa Porn community, so there is some precedent for having multiple communities here.
Once you install it you'll need to grab a checkpoint (this is the base model that you want to prompt from). For realistic, start with the URPM. For Hentai check out Meina Hentai. Put this file in the models/stable-diffusion folder.
Now run the UI and load the local URL in your browser (the URL is on the command prompt).
When in the UI, put the stuff you want to see in the Prompt section ("photo of a naked woman with large breasts") and the stuff you don't want in the negative prompt section ("bad anatomy"). Click "generate" and now you're prompting!
There's a stickied post that explains in more detail, but these are the basics.
Kaho Shibuya?