Re: What to do with a rogue left hand?
Just a few extra tips outside of drumming that benefit equal hand dev:
Hand strengtheners (light tension)
Martial arts, hand yoga, stretching etc.
One-hand clap (finger, hand dexterity)
Two-hand clap(wrist dexterity/endurance)
learning to write, throw, bounce, etc. anything you do righty can be done lefty.
there's plenty more possibilities but these helped me massively in the past decade.