I never learned to type formally and also use a limited amount of fingers. On my left hand I use my thumb+middle+index finger for everything except zaq and modi

I never learned to type formally and also use a limited amount of fingers. On my left hand I use my thumb+middle+index finger for everything except zaq and modifiers which I use my ring finger, and on my right hand I only use my middle and index finger for everything except for backspace/delete which I use my ring finger for. Still manage to hit 100WPM.