The only place I know that's not textbooks is this group:
Maybe you can find some resources here.

www.facebook.com/groups/anime...

Thanks for asking! Yes I'm going to be a month behind still. I hope to get through everything by the end of January! We're going to be looking for freelancers on a ton of projects for Key Animation and Background painting!

I think the point of this app is that we won't need Bluesky even if it goes under because there will be people developing on the same protocol. All of our followers and data will be portable between platforms

They just need to hold on long enough for some solid competitors to build on ATprotocol.