Nightlife in Australia? (Help)

I’m 20 years old (male and American if that changes anything) and I’m planning on taking a trip to Australia with one of my friends. I’m very outgoing and friendly with people and get along pretty easily. The main reason I want to go to aus is to have fun and party. (To find women)

Is there anywhere that anyone could recommend me go to have a good time?

I once had a short relationship with this Australian girl that came down to the us as a transfer student and I instantly fell in love with her. Her accent just drove me nuts. But after she left we had a falling out because she was crazy but I honestly just miss that. So now I’m on a mission to find my next Australian wife.