1st concert I gave?...in 4th grade.
The school band did a Christmas Concert. I played Coronet that year... or as my first year in band, 3rd seat Trumpet.
First concert I saw? ... The Nutcracker. I think I was in 3rd grade. it was done on a weekend by a local High School's Senior class band, and drama dept.
First rock concert? .... Sorry... Not sure who I went to see... I think I had to many vitamins that day. Well, they looked like vitamins.... and that was over 30 years ago.
I'm on a strickly organic diet these days... thank Goodness too... Them vintage '70s vitamins nearly killed me.