Can confirm from personal experience, KDE Plasma is arguably the best choice.
I used it on a tiny Surface Go without issue, and I use it with a touch pen display.
You can easily rearrange the UI so things are positioned where your hands are.
Also, it's the only setup I found where I could rely on virtual keyboards alone, after installing OnBoard.
I also tried Gnome and PopOS, and Plasma came out on top.
I found a little bit. I found some papers and articles saying the striatum is different in both autistic and ADHD people. And I also found that the striatum is thought to be the part of the brain responsible for habit formation.
I didn't keep a list of links but if you search up those topics you'll see for yourself.