Personally: Hiking, biking, photography, DnD, and fixing things.
It sounds like a lot (because it is lol) but with ADHD having a group of hobbies I can orbit around (especially if they can overlap (like these ones))can help me avoid diving into too many new hobbies.
I’ve taken up crochet for a while now and it seems to be a keeper (I tend to flit between hobbies a lot). I guess what makes this different is that a lot of the things I make are for others. My daughter loves the bracelets I make for her (the ones I’m not keeping for myself :) And recently I made a little bunny as a going away present. Having a goal like that is a great motivator.
I hope it’ll stick, because I do love it as a hobby. There’s still so much to learn.