I used to fiddle with my hair a lot. It was longer, but also had a lot of split ends.
I nail bite long time ago. It lasted until sometime at college.
Also fiddling with my fingers. Yet I don't anymore.
Half of my self soothing is daydreaming. The rest is screen time.
I used to have plenty of special interests.
But... It came to a point that I'm even more trapped in a very dysregulated body more than ever, add being a damnable adult.
It's like...
Sleeping in class to avoid sneezing for several hours straight, avoiding all the sensory stress and from talking to anyone; which I did through my school life.
Maybe it just became this expensive way of self soothing through consuming snacks of specific textures and flavors... Or maladaptive daydreaming and self talking.
Yet that may also mean an entirely different problems altogether than just stimming and self soothing.
I'd rock, tip toe, flap my hands, jump around, spin, make a makeshift dice with a star inside and rattle it, play with any pen, peel whatever I can peel off, bounce my legs off the chair... Even kick, toss stuff, headbang, crush someone with a bear hug...
... Only and only if I feel and 'remembered' to do it. It's not like I ever actively tried to hide, deny or suppress any expressions of stimming (or being odd overall) in my part.