Concert photography - Need help!

Hello!

I'm going to a metal concert tonight and decided to take pictures, for once. This is going to be indoors and I'll easily be able to be in front stage. (Small room)

Because it's an avant-garde metal band ( This ), I feel the need to take pictures of their incredible performance.

Anyway, the problem is... I have zero knowledge about photography, and I'm currently using this old piece of shit.

I know, I won't take awesome pictures. But I'd like to know how I could manage to take the best pictures with this camera.

Thanks! :)