Swap hands. It's not hard to run a mouse with the left (or right) hand.

Also, most applications have really really simple control codes (left over from the AnteRodentia Era) - CTRL-C to copy, CTRL-V to paste, CTRL-N for a new window in the same application, etc. - you can do almost anything without leaving the keyboard at all. Mice only came along when computers started to fill up with pictures and icons and other stuff, and computers still work perfectly well for text or numbers without the continual reaching for the bloody pointer. And the resultant aches and pains.

Save your wrists and finger clicks for your guitar.

John Kidder