The quickest way to immerse oneself into Aussie culture is a day at the Sydney Royal Easter Show. Think of your typical American county fair, but with maybe half a million participants. But ag is what it's all about. Horses, cows, sheep, dogs, crops. Riding contests, polo matches.  

The interesting thing to a fresh mostly foreign observer from California is that a) the majority of the population is of European descent, and b) the majority of the population have no evidence of eating disorders, being mostly average body mass. This is in stark contrast to any California audience of similar size.