Don't look into the eyes of the crowd. If there is a big group, when you're first one stage it's like a million eyes are focused on you and it sucks. You'll get it soon; every single person infront of a crowd has a nervous reaction as chemicals in their body go haywire, whether anyone realizes it or not. Trained public speakers who are doing awesome sometimes start having their teeth chatter when everyone is wearing tank tops and shorts, or people get really hot even though the temperature is mild.

It'll get better after a view, sonnyganthony.