Welcome!
I don't have specific recommendations on hand because I'm on mobile, but you can look through this guide from [email protected] for other ways to discover communities
https://lemmy.ca/post/11285664
Following the promo communities works great so you can passively learn about new things when they get promoted
Most of the details are things that you might already know, or assumed was happening, but the article is a helpful resource for links, evidence, citations, and summaries