I joined a climbing gym after learning how to climb, belay and rappel for a week. I love learning knots, so that's fun, but also all the terminology and techniques. Plus there's a whole social aspect to it (climbers tend to be pretty friendly). Turning out to be a healthy and exciting new hobby!
Also @fool I remember learning to whistle as a kid--my dad was slightly annoyed he had shown me how to do it because I wouldn't stop whistling the main themes from Indiana Jones and Star Wars

I have been dancing around taking the plunge into GrapheneOS -- I have a pixel. Glad to hear you say this, bc it gives me confidence that I could move to it and not lose absolutely all the apps I have become accustomed to. There exists a list of apps that are compatible once de-googled (un play-protected), right? Also, I saw you mentioned that graphene can sandbox google play?