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!
lichess.org is a fantastic online chess platform for players of all skill levels. it’s free and—what’s more–it’s ad-free (unlike the parasitic organisation that’s squatting on the chess.com domain).
it has one-on-one on-demand match-ups, tournaments, puzzles, user-published training courses, multiple chess variants, and so much more.
it’s one of only two online resources to which i deem donating regularly worthwhile (the other being wikipedia).
do check it out. chess is one really healthy mental habit to inculcate.