My background: I’m age 66 male (will be 67 in a few days). I was studying classical guitar at University of Toronto for masters degree in guitar performance when ½ way thru, I stopped going to classes and went instead to the Library to study a used pre-calculus textbook that I bought at a Toronto book store. I’m a retired actuary after 30 years of service. I haven't touched a guitar for 42 years until now.
Ha ha! That's really funny! I was studying engineering at the UofT and in my second year, I used to spend all my time at the library of the music department listening to recordings and checking out scores and music books. I was taking 2 music courses after auditioning to get in to the real music program so I could take them as part of my "breadth requirement" for non-technical courses but the time spent in the library was out of my own interest and unrelated to these courses. I am certain that you will overcome your problems if you don't overdo it, and get back into getting pleasure from playing your beloved instrument.