I think learning to oil paint could be a very meaningful experience. Relaxing to watching Bob Ross videos and paint along with him.

I do also feel there is this sort of "cult" of self-improvement going around. Like if you're not spending every waking minute of your life learning some new skill or marketing yourself or trying to get a promotion, then you're wasting your time. It's very toxic.

Doing things that you find relaxing should be accepted, even if they don't teach you anything or improve you in any way.