For those of you who are worrying about getting on stage - it does get easier. Obviously you still will get butterflies beforehand, but after a few (might be, 2-3 might be 20-30) performances you'll find that once the music starts up, that's all that matters. If you get the opportunity to perform*, take it because it's all experience and that experience will count towards your eventual 'zomg, MUSIC!' attitude on stage.
*For friends, family, rest homes/retirement villages, etc. People who will be happy for you to just come & dance because you're you without any huge expectations. Leave the huge crowds for later when it's 'zomg, MUSIC!' for you instead of 'what if they don't like....'.