Bell Choir - Ergonomic Keyboard
F11 > rebind your 1-4 and 6-9 keys to letters, boom, letter option included
I simply left my bindings as they were, and used my left hand only. The right hand was on my mouse, and all mistakes I made there were mostly made up with the left hand.
I found the middle range was best suited for this.
Rebinding my keys simply for this wasn’t worth it. Especially as I don’t have a range of 4 letters beside each other unbound.