Playing small serves no one!
"I know I'll have to apply for jobs that are a few levels below where I was at before I came here"
You don't know that, you've been told that so many times that you are mistaking it for the truth.
When you play small, nobody wins, not you, not your employer. Nobody!
Because you playing small means you're partially hiding your abilities.
Did you come to Australia to hide or thrive?