I think a pretty good start is Civitai website. You create a free account and they give you some of the credits for free (called Buzz), they also have loads of youtube tutorials for all the AI stuff (not sure how they are though). Then you start by choosing a model you want to use, I recommend anything Pony or Illustrious based (if that makes any sense to you). After that it's all up to you building the prompts and figuring out the generator settings but for those you can start by just straight out copying them from someone elses image on the site (like mine

). Civitai allows all sorts of NSFW stuff and only disallows the more obvious ones like lolis, gore, bestiality etc. I'd be happy to give any further tips using that site if you decide to go that way.