Teen- where to start?

Hi, im 15 and ive done quite a bit of drama lessons at few places, and been involved in MANY school plays, mainly on stage but behind stage too. I've always loved drama, but never done any plays out of school. I was wondering where i should start. I've seen some auditions at www.theatrepeople.com.au but i don't know if i'm quallified enough. I live in melbourne. Can someone help? Thanks