Picking back up a hobby from your youth... and being better at it.
When I was a kid (10-12 years old, roughly), I began carrying a deck of cards everywhere. I taught myself some basics of what is now (maybe it was then & I just didn't know it) called cardistry. Just various flourishes and other tricks. Essentially, I was on the path to teaching myself sleight of hand. No books, no nothing. Just fumbling my way through doing neat things without a teacher.
I sort of fell off because you can only get so far. Esp. when you have smaller hands. But I kept to keeping a deck of cards on hand at p. much all times (every bag I carry is likely guaranteed to have one in it) and I collect cards.
Recently, I began watching a YouTuber who is a magician, does cardistry, and solves puzzles (the puzzles are why I began watching :P). He sometimes does tutorials on his channel. Which got me into other tutorials. Which got me back into things. And in just a few days, I'm doing more than I ever did. I found, through tips, tricks, etc... how to be able to cut the deck single-handed. I would have, years ago, sworn it impossible for me to do.
And yet I can sit here and as of tonight, do it again and again. Not perfect. Not quickly. But I'm doing it. I know I'll never be as good as some of these kids out there, but... it's fun and it's a skill I'm thrilled not only to return to, but to improve.