ROCK THAT GLOCK!!!!
Go have fun and don't panic but relish in the adrenaline! Your goals are right on point just let everyone know you are a NooB and they won't let you fail. Get in a routine before the beep and do it for every stage. Maybe a little mantra, "safe, focus, sight picture, trigger control and muzzle awareness".
I remember my first time. Loved that feeling so have fun!