I'm 19, my singing isn't bad but i'd like to get some training for a bit. My dad is a musician and keeps telling me it's too late for me =(
I don't think you're ever too old, but there is an age where it starts to get a little more awkward to take lessons like that. I'd say about 20-ish
A lot of vocal teachers don't take students until their voices are fully developped, so like 13-18 is good time to take lessons