Only read a handful of responses, all negative. I have several friends who have settled in Aus and love it. My DH moved there many years ago and hated it, I know I’d happily live there.
Things you need to think about:
Visas - you might get a temporary visa but it’s not that easy to live permanently unless you have either married an Ozzie or in a job in demand that sponsor you to stay there.
Climate - not everywhere in Aus is hot and some of the hot places aren’t somewhere you’d necessarily want to live.
Hospitality - Not everywhere is very welcoming to immigrants and English people. Some areas are great, I’d join some ex-pat forums and find the right places to look at. A friend of mine looked into a police recruitment drive, he would have had to reduce ranks but then found out a lot of British cops returned due to bullying so passed on it.
Cost of living - you won’t be entitled to any benefits, will have to pay for health care. Most decent jobs will pay enough to cover basic living but if you loose your job you’d be screwed.
It sounds like your keen for a change, I would definitely do it, I did it many years ago, just not Aus, no regrets, it was a great adventure. I’ve been to Aus a few times, it’s definitely a great place, loads to see, do and enjoy. My all time favourite thing about Aus (other than the wine) is the food, absolutely amazing culinary experience, so much variety and so fresh.
Go for it, even if it’s just a year waiting tables and travelling, enjoy yourself.