Hi Roger,
My adversary has been M.S.
It affected both hands over twenty years ago & I spent almost a year unable to play at all.
I've since regained almost all use in my right hand,& much in my left.
Playing your instruments every day is probably the best therapy for you.
Keep your frustration level in check.
There were times when I couldn't see any light at the end of the tunnel,& I'd started to beleive that I would never play an instrument again.
That's when I had to lay the guitar down & walk away for awhile & come back to it an hour or so later.

You'll play again.
Just keep at it.

Ron.

Feel free to send me a P.M.