I've got to admit, I envy you guys that are starting out very young. I hope you enjoy it, become good at it (if you're not already), and keep at it.
I regret not starting sooner, but my career and family situation (coach rob) wouldn't allow me to start until my kids were grown. Hopefully, my jealth will permit me to continue for many yrs to come.
PS - Oldest I've seen is 69 yr old. I was on the court with him two yrs ago when a VG player fell into him on the endline and blew out his knee. Saw him doing a VG scrimmage last yr - he doesn't get up and down the court too well anymore, but knows the rules and can still manage a game (NCAA bound?).