Hi
With regards bar work, you may find that difficult as you need to have a licence to do this. Not like the UK where anyone can do it. The course can be done over a couple of days and isn't too expensive (worth googling it)
Commutable areas for you (in order to live in vibrant areas) are - Neutral Bay, Crows Nest, St Leonards, North Sydney, Chatswood, Lane Cove (Basically, anywhere on the train line that takes you to Uni)
Feel free to email me (nick_jenkinson@hotmail.com) as i don't normally come on PIO anymore. Just occasionally.
Cheers