Totally agree with @RED. Getting a job before landing here is what many of us aspired. But I only knew few people who were lucky enough to be in that boat. One friend told me that they had very good referal connections to their employer so they got the job before flying here.
That is why @rcbconopio I said in my comment post that you should prepare your mind, heart and bank account. You need to allot a big sum for the living expense until you get a job here. This includes budget for rent, food, transpo and other essentials. Seems to me that you are open to work in any state that will offer you your first work opportunity that meets your expectation. As long as you have a big budget to fly-in fly-out, you will be alright (ex. Melbourne to Sydney or Sydney to Perth). Just stay in a hotel or airbnb or bagpacker or in a friend's house for few days to attend interviews then go back wherever.
But if budget is too tight, my suggestion is same with @RED, for you to already decide which Aussie state you like the most and have solid plans. It is always a competition, not only here but everywhere, so we need to be patient during job hunting.
Goodluck and pray for guidance.
All the best.