Instead of biting my nails or playing with a fidget toy, is there a skill I can learn/practice?
Like rolling a pen/coin through my fingers or something like that.
Get a balisong/butterfly knife and just practice opening and closing it without looking and with minimal movement
annoying
Think you just answered your own question.
Seriously though, coin rolling is great for dexterity and you can move on to some simple slight of hand magic
Drumming
Related: get a Digitakt or Syntakt from Elektron and make music while you stim with clicky buttons 🤩
I learned to count to 31 on 1 hand using binary. I’ve gotten more than a few free drinks via bar bets with that skill lol.
I’m going to learn this skill and wonder why people are counting to 4 in front of me.
Was it a bar at a software companies happy hour?
Who would bet a drink against your ability to count in binary?