I have a left hand problem that developed prior to my cervical fusion. Left had is very shaky and numbness in pinky and ring finger did not go away after surgery several years ago. I do work around it by using auto accompaniment and have all but given up the guitar- the fingers won't spread or stretch well. I play mandolin to keep limber, buying those with the smallest neck circumference. Right hand starting to shake too. Left the day job of commercial electrician behind....but I still play- maybe not for as long as I used to , but I do. No accordion anymore- can't reach for some bass buttons.But I do notice the more I layoff in between playing, the worse it is. So keep going!