#2
have a drink....just kidding just relax, think of it as another practice with your band
Ibanez GSR190 Bass
Ibanez IBZ10B amp

Ibanez GAX30
Boss DS-1 Distortion
#4
Practice.

And memorise your songs so that you don't even have to think about what you're singing.

Keep singing them to yourself until you're doing it without even thinking.
#6
There's a thread a lot like this... check it out, it's really helpful.

Thread

But just have the time of your life. Get an adrenalin rush. Have fun, first gigs like this are always memorable moments.
"1456"... if you're reading this, you know what the code means, and i mean every word of it.... 1456!!!