School performance

My second grade son is in a performance for veterans day. He asked me last night to skip school on Wednesday which is early release and after school bowling day so I immediately knew something was serious. I delve into why ? What's supposed to happe on Wednesday?

He tells me he has to perform in music class and gets a shy look on his face. He is usually an EXTREMELY outgoing boy that is constantly concentrating and making new friends absolutely everywhere. I was shocked when he seemed shy.

Any confidence boosters I can share with him to make him more comfortable?

Any tips or tricks you have that I can give him as a tool to use?

I was shy in the school too but have grown into an outgoing person and I just want him to break through now instead of wasting years being shy when it's actually going to be so much fun!

Thanks mamas!