Erm, i didn't get the dumb broad reference Iconoclast...
As for fitting in in Oz Midnightracer, it's easy: don't take anything too seriously and be prepared to see some seriously tough cars (also known out here as unroadworthy), hot women and full-strength beer (5.0%? Nah, gimme a 12% brew!).
One thing you'll miss is the US aftermarket. Seriously, we've got some decent Japanese stuff coming in, but it's super expensive and a shitful amount compared to the range of parts you guys get.
I asked the Mazda dealer how much it would cost to get my car decked-out in Mazdaspeed gear and they looked at me like i'd just dropped my pants in front of them. The response was "isn't our car good enough for you? Maybe you should've bought an RX-8 or a second-hand RX-7"
It bites like a hungry b****