I want to be in a Musical!

I can sing very well, I can speak well too, I can dance (actually its Latin American Dance) and I'm smart, organised and doing excellent at school. But now I want to be part of a chorus in a musical staged and rehersed in Sydney (preferably in the inner west or the city). I'm 18 years old and a 'blast' to work with. I love to sing music theatre and I've been doing it for 6 years. If anyone has any suggestions, information, or offers for me it would be great.
I am finishing my HSC this year and I have been so bogged down with academic studies that I haven't done anything I wanted to do. Now I want to star in a musical/ opera (i have my mind set on it) in the chorus or similar.
My email is titan911@hotmail.com