^Even though you dislike me, I'll give my advice and you can take it however you want.

Speaking from experience...rap is an image, and you have to have your own image. Don't make up one that is fake because the audience will see right through it. Go up there, be "Tha Q" or whatever your performing name is, get hyped and enjoy your songs and believe in yourself to the fullest. If you show the crowd a good show, they will love you. Some people worry too much about well maybe my lyrics aren't tight enough or maybe I'll look dumb or something...the main thing is Confidence.

You'll do fine, just get your scheme done pat and do your thing. Performing live is the best thing ever. Nervous as shit when you step up, and you feel untouchable afterwards.