I’ll start by plugging Harvard’s free courses catalog as well as Udemy
Edit: Gonna add 2 more I remembered-
Blender - I wish I had more time to learn it, but I did start the infamous “Donut Tutorial” once!
Watch Cartoons Online - Lots of good older stuff!
I’m subbed to anarchychess which is probably the largest chess related community on lemmy I don’t even play chess with any regularity :>
It’s all shitposts about chess but still pretty amusing nonetheless.
https://sopuli.xyz/c/anarchychess