Picking hand stance

I hope I can help because this is something that I was experimenting with the faster I try to get my right hand. I personally feel that anchoring your hand to the guitar is a bad habit to form because should you ever go cross-string or begin to pick, your hand isn’t free to move up and down the strings the way it needs to be. The only time I ever anchor my hand to the guitar in any way is with finger picking, although that itself is still not an appropriate approach because in complex finger-style includes your pinky finger and if it’s anchored down, you can’t use it.
I learned a very valuable lesson from Papa Gates when I had to re-learn proper picking handling technique: Because of how I was holding the pick (with thumb and first two fingers) it was going to eventually limit my ability to hybrid pick.
I’m sure there are some well-known guitar players that anchor and work around/with it, but I personally feel that the control should come from your wrist and arm. I hope this helps!