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!
It’s Russian software so yeah… 🤢
https://dms-solutions.co/blog/dms-solutions-stops-doing-business-with-onlyoffice-due-to-onlyoffice-close-ties-with-russia/