Back a while ago I was a musician, said by a few to be one o' th' best rhythm guitars in my neck o' th' woods. An' I always, ALWAYS had Stage-fright. Seems t' me that's th' same thing y'all are experiencing an' callin' it "maiden Flight Jitters".
It's called, formally, "performance anxiety". The only "Cure" I EVER saw was to just GO DO IT!
Cheers!
RD