First concert (other than local area bands) was Bob Dylan with the Hawks at the Bushnell Theater in Hartford CT on 10/30/65 when I was 16. Saw him again for my second concert on 2/18/66 at the New Haven Arena. Went up to the side of the stage at the end of the first set and shook Bob's hand.
My third was 6/17/66, the Rolling Stones at Dillon Stadium in Hartford.
Not bad for my first three....hundreds more since then.