Hey! Sorry I'm late! Are you asking how to use Civitai, or Generative Art in general?
If you're looking for for a high level overview of what all this is, I have one here - https://civitai.com/models/22881/theallys-100percent-beginner-guide-to-getting-started-in-generative-ai-art
I'm working on a how-to guide to using Civitai too, and I have a popular Patreon with a bunch of intermediate and advanced tutorials for generating AI art locally on your own PC.
Alternatively, there are a lot of good Youtube resources out there to help you get started! Good luck!