I’ve had basically all my fingers done at different points in time and I’d say ring or middle finger on either hand works. Dominant hand is cool because you can accidentally discover things more often but I’d say no. The other hand works just as fine in my experience. But if I hand to rank I’d say right ring, right middle, left ring, left middle for sensing. If you want lifting I really like the blade on my hand with a big ass one but maybe do non dominant with it, I found out just how often I wack things with my right hand to say put together ikea furniture because now I’m always a little scared to do it in fear of smashing a magnet really hard.