Generally speaking, most travellers I've met either started in Sydney or Brisbane and worked their way up/down the east coast ending in Cairns. Again all this is my opinion and a massive generalisation but all the Aussies I've met have been amazing, generous and friendly! They love a good English person! As long as you can take a few jokes about the place then you're golden
with the work thing it's really just a case of how lucky you are. For example, my and my other half came to Brisbane, both as Baristas, I got a job within 2 days but 5 weeks later my partner still hasn't found anything. Good luck to you though, coming here will be the best decision you will ever make!