Just some thoughts - most people coming from the UK say they want to move to Sydney or Melbourne. That’s fine, but think of it like London, it’s more expensive to live there than other locations. I did Sydney for 15 years before moving to a big town/city in NSW close to the beach (eg: Newcastle, Port Macquarie, Coffs Harbour, Wollongong). Housing prices and rents (the big expense here) dropped dramatically and I was able to get much more for my money. I also live within both viewing and walking distance of the beach, which makes for lovely before work yoga on the beach and afternoon swims/walks on the beach. The commute to work is also far less than it would be in Sydney or Melbourne.
Another advantage is schools are (I think) slightly better in the big country towns, and you’ll probably get to know people/friends yourself via the school. Eg the kids will all come from close by so you’ll see them at the same beaches you go too, they’ll be on the same sports teams (either organised by the school, or the local one) or their sibling will be in the same team and they can be playing together whilst you watch the netball/cricket/soccer whatever.
The downside is less cultural events/activities in these places and that seems to be a big thing for most people coming from the UK - even in Sydney or Melbourne there are less. But it’s a different lifestyle here. The weather is so good you are just out and about in it all day.
Dr’s are fine. You don’t need to ‘register’ like you do in the UK. I have a Dr near my work and a Dr near my home. You can call any Dr’s and ask to see someone, the question will be when they are available. If you are willing to see anyone you can usually get an appt that day. If you do have a Dr at a certain clinic, you may have to wait a day or two, depending on their bookings. If I just need something simple, I’ll see anyone at the clinic. If it’s for something serious or ongoing, I usually wait for ‘my’ doctor, as she’ll usually know the history. Some places bulk-bill (ie appt doesn’t cost) some places charge a ‘top-up’ on the bulk billing amount, could be from $30-$50 depending on the place. You’ll need to get health insurance. It’s built into the tax system that if you earn above $186,000 as a family ($93,000 single) you pay an extra 2% of your income in tax as the ‘Medicare Levy Surcharge’ unless you have private health insurance. You can get all different types of private health insurance, including some for as lower than what you would pay as the surcharge, so it’s worth getting.