Planning a summer trip all-over Australia

Hi guys!

Moved to Australia for a year recently (job).

Fantastic country! But still getting used to driving the "wrong side" of the road.

I have a plan of taking a ride all-over the country this summer, in a big circle. I want to visit biggest cities (Sydney, Brisbane, Darwin, Pert, Adelaide) and as many Natural Parks as possible. Planning 30 days for the trip.

Any advises?

Maybe someone here did the same already? Or maybe someone willing to join?

And what bmw internet forum is the largest in Australia?

Thanks