I love Australia but there's a great deal to love.
It's English speaking so you wouldn't have any difficulties. Things like Breakie and Root become obvious fairly fast... like when I have to root around in my fanny to get change.
It's a first world county so any skill you have (presumably here in the USA) will carry over. Unless there's a licensing issue like a doctor or plumber.
Adelaide is nice but boring. Canberra is a bit boring. Sydney, Cairns, Surfer's Paradise, and Melbourne are all nice. Sydney probably gives you the best launching spot for the other Australian towns and you're close to New Zealand and the island and Tasmania.
I suppose the outback is better geographically but you'll in the desert...