My first show was at a school telent show in 2nd grade.
I was on drums, and for some reason I had no fright at all. I felt overjoyed to go on stage and play for 600+ people, we did the song "Sin City" by AC/DC.
For a bunch of 2nd graders, we kicked ass. I knew what I was doing, and I felt confident. That just drove me to play.
And I still play gigs, and I love playing for people. I just love the feeling of running out on stage, it's just an incredible feeling to play for all those people, the anxiety, the adreliline, just feels so damn good.
I don't know why, but I just love it. I have/had no stage fright, if anything I overpower my band in presence. Me bouncing around behind the drums and getting the crowd pumped.
Its just so much fun.
Trust me, just know your stuff, if you mess up, don't try to play it again, keep going. If the guitar and peeps get lost, keep playing.
And just enjoy it.