My first "show" performance was WAY back in 1962. I was 12, the corps was 2 years old. NO ONE in the corps had ever performed a drill. We were young, ignorant and fearless! We were on the starting line, waiting for the "other" exhibition corps to finish. Waiting in the hot sun, wearing wool cadet style uniforms, wishing the "other" corps would finish so we could go on. We had learned only the first half of a show, but we were so proud and anxious.
I was impressed by the "other" corps performance. The ONLY thing I remember is their hats "floating" on a cloud of dust. Finally it was our turn. Of course, we were not nearly the caliber of the other corps that marched that day, but we didn't care. Again the benefit of being VERY young.
You will NEVER NEVER ever forget the first time. It will be forever burned into your mind and soul. You will do fine, once you actually start your performance. You will be so involved with what you are doing that your nerves will disappear.
Oh, I forgot to mention that the "other" exhibition corps was the Hawthorne Caballeros!