Sounds tiring as hell. If I were to ever bet on something to challenge myself it'd probably be something related to either programming or drawing? E.g. draw X characters in Y days. I've done Inktober before and I'd honestly consider that one as a challenge. It was difficult as hell since I always, ALWAYS procrastinate my drawings. Like the moment it just becomes off in my eyes, I stop and put it in the storage for days before even touching it, if I even do lol.

Something recent in my social media feed that's been popping up were marathons. Bunch of my friends and their acquaintances have been sharing milestones of marathons they've been doing. Sounds kind of fun really.