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!
Learn a little docker and start self hosting stuff! Pihole is a great one to start with, but there are lots of other awesome projects out there:
https://github.com/awesome-selfhosted/awesome-selfhosted