Advice of for ergonomic solution for audio editing?

Hi all,
I’m a podcast editor and spend a lot of time on Audition editing. I’m looking for more ergonomic solutions. I’m going to begin trying out a vertical mouse for my right hand. But I’m trying to figure out a left hand keyboard shortcut solution. I’ve been thinking of using a single handed gaming pad, a programmable small keyboard like the Koolerton keyboards.

Ideally I’d like something like the Nintendo nunchuck with multiple buttons where my hand isn’t tied to being palms-down on the desk.

Would appreciate any tips/advice.
Cheers.