I know the feeling you're describing exactly! I can never seem to keep my hands still. I used to put my palm on my face, but that was giving me acne. Then I switched to playing with my lips, which chapped my lips something fierce. I think my go-to item to keep my hands busy is either my phone or a pen. Anything where I can keep my thoughts organized and written down somewhere. I make to-do lists for every single day, even if I have nothing in particular to do. I find that's a common practice for a lot of people with ADHD. A stress ball might not be a bad idea. Anything that keeps your mind and body busy is a good thing.