Your First Concert was.....

Gary Puckett and the Union Gap in my high school gymnasium, '69 or '70?

Funky Meters at the Warehouse in New Orleans.

David Bowie 1975 at the Olympia arena in Detroit

hmmm . Roger Waters - Pros and Cons of Hitchiking tour.
Not bad for a first show.

The first I remember was Elton John at Kent State University's Memorial Hall. May of 1972.
"Mad Men Across the Water" was the only album out and he played that plus a great deal of "Yellow Brick Road."
The only better concert I've ever seen was Pink Floyd (1973)same venue and they played more than one song, in surround sound, from an album we'd not heard. Some obscure album called "The Dark side of the Moon".