immoving

Hi! I'm moving to Melbourne on the Working holiday visa with 2 friends in October. We are 22 year old Americans, we're probably going to get waitressing jobs and we definitely won't be the richest people around. I was wondering what areas would be best for us with a low budget but still be around people our age and close to public transportation. Right now we looking at St. Kilda but the more information we have the better! I was also wondering about nightlife in Melbourne and where the funnest areas are. We are looking forward to enjoying Melbourne and exploring the city as well as Australia!