Remarkably similar to you, schoolmates start a band need a bass player. Up to that point I was a dismal guitar player with I think 6 chords, might have been 5. Our school music teacher was helpful allowing us to practice in the school after hours. The original band went nowhere but one of the guitar players and I did go on to join up with a couple of older boys and do a few gigs until that folded. I carried on and have a great time, earning more than a few Bob in the process but what happened to the others I have no idea. One regret I have is that I never kept in touch with any of my schoolmates when I left school. Unlike my wife and my children who I’m pleased to say still support me in what is a consuming hobby.