Hmmm, lesseee...
Farted around with harmonica starting around 14 (?)
Decades of guitar diddling starting around, um, 15, 16-ish?
{Gradual realization that I wasn't exactly born to be the next Jimmy Page, or even Joe Blow. And, y'know, Life...}
Finally got some electric basses a few years ago (I'm a few weeks shy of 60), enjoyed them a lot. Also realized that since I'll never "perform," and I live in a tiny apt. (it's about this [ ] big), what the hey do I (or the neighbors!) need electric for? So now my only instrument is my ABG fretless.
I think it was doing a lot of home recording in the early '00's that convinced me my skills overall only go so far; my baseline level of coordination is just not so hot. And frankly I never had the personality for the spotlight, and (back when it was quasi-practical) never got into band situations that lasted very long, for all the reasons all you band veterans know too well. But I've always loved music, Mom was a very good classical piano & organ player (albeit w/stage fright), Dad was a good bass/baritone singer (before cigarettes did their damage), and I was exposed to all sorts of good music from pre-natal onward. But I outsmarted myself from learning to read music in grade school, since I could get the simple little parts by ear (I was whistling toddler obligatos to Mr. Bach while yet in diapers), plus I didn't see so well. Though I tried many times since, I've just never been quite able to read, lessons and practice notwithstanding. Guitar allowed me to doodle endlessly whilst daydreaming (oops), but I got as good as I was getting probably around my mid-30's. Playing fretless (no lines) means I have to listen, pay attention. I've also been reading the first, oh, 90-so pages of Hindemith's "The Craft of Musical Composition" (Dad's old copy from when he took P.H.'s course at Yale, even) where he derives the chromatic scale from the overtone series on C, and then derives the intervals from the combination-tones of the overtones. Or something like that. (It's available as an online PDF, if you're curious.) Since, with a bass in a quiet room, it's possible to hear some of those things, unaffected by the "equal temperament" imposed by frets, I've been finding sound-making much more interesting.
Sorry to slobber on and on... If I have a point, perhaps it's that making music is rewarding even if it's only for the spiders and you, so if it turns out you're not a [insert genre here] star, playing can still be fun and stuff, whatever your situation.