In the mid 70's I started accompanying a good friend as he went around the area trying out for parts in local theatre productions.
He encouraged me to try out as well, and in trying out for the Lion in a Wizard of Oz show I found that I couldn't dance. If you teach me a dance I can do it and do it well, but if you tell me to dance during a try out, I am the worst. My Cowardly Lion's voice was Snaggle Puss, which I thot wuz original and similar enuff to Burt Lahr version to be a great touch.
Didn't get the part, and kinda glad once I thot about the big heavy hot costume. Exit, stage left.
I did eventually get a lead role, MR. Bennett in Pride & Prejudice. On one performance with just me and one of my 'daughters', I forgot my line. Shit, time goes so slowly. Luckily she realized what had happened and quickly got me back in line. That was so frightening that I never did stage work again.
One of my housemates supports himself by acting, mostly as 'simulated patients' for medical training. They are given an outline of what they are supposed to be simulating and it's symptoms.
I know another person who reads books on tape, giving him the chance to do various voices.