I joined a new band last year (I was 42). It didn't work out for a number of reasons, but partly because the other band members, despite being in their late 30's, had teenage expectations of how much work was required to get gigging. Apparently 1/2 a rehearsal was enough for a new, original song, then move on to the next; planning gigs a fortnight away with a setlist of 3 partially finished songs etc. Not impressed.
I think that you're never too old to rock n' roll (JT), but maturity and experience makes you a better musician and band member.
You'll find the right band & forget all about the yoofs 😀
Good luck!