All of what they said.
We came from the UK in 1986 and wherever you go in Australia is good but Perth is the place I would choose over all the others.
We chose to live in the Nortern suburbs because it was nearer to the beaches and stiil live in that area.
The far north of the state is fantastic if you like isolation and unspolt scenery.
The South is just as good but different.
Can't comment too much on the Eastern part as I haven't had time to go there yet but retiring next year so theres time coming up to do that
Hope you enjoy it, most of the people I know are migrants of one sort or another and have had no trouble settling in, plus you have the advantage of this site to help you solve whatever problems may arise.
best regards

