I have played a varity of instruments over the years from 10 years of age to now 80. Clarinet, Sax, Accordion, Guitar, Piano. Almost good on clarinet and sax. Failure on accordion. Almost pro level on piano. In my sixties and again in my seventies I tried to play guitar, which I really love, even more than piano. I was past 60y.o. when I first tried to play guitar and piano. Piano for some reason came easy, not classcal. Guitar, I was always to stiff. Short fingers. My whole body has always been sort of stiff and over 60 it was not getting better. Last year 2017 was the third time I tried guitar and actually had tears falling from pain when I tried to play guitar again. I was even having some pain playing piano. I have osteoporosis in my legs and parts of my lower body. 2017 the doctor found C2, C3, C4, C5, and I think C6 are cracked/broken. Sometimes I have serious pain. About August/September I was on AccousticGuitarForum. I found out about what I thought were toys - ukuleles. Ha, nice toys for old kids. I started with Baritone in September and Tenor this last May. I love both of them and with weekly therapy I am able to play almost painlessly. I play both every day. Last month I purchased Guitalele GL1. It is a little cramped but playable. I am now looking at a half size Yamaha Classical Guitar which I tried in the store and to my surprise I can play it with no problems. I really love guitar, however, I also love the ukuleles and they stay. I am getting more lazy every day about piano.
Note: I ignored the doctor last year who said I must have surgery or never again play a stringed instrument again. I started going to a private physical theropist for weekly treatment in January and today I play almost pain free. I go weekly now and may go forever. I am more limber at 80 then when I was 40. The theropist and I both agree that the injury to my left hand was a seriously strained or torn muscle that was never treated and got worse over the years. I still have other problem, however, I am playing ukuleles and small guitars and smiling all the way.