Actually being Australian is easy, I'll give you all lessons, for free.
Step 1. Pretend Australia is the best country on the planet. I mean why not? We have skin cancer, bbq's and Holden V8 utes. Our residential building standards are equal to at least Thailand and while we're on the subject of Thailand, take your holidays there and enjoy ping pong shows in Phuket. What's not to like?
Step 2. Pretend to be egalitarian by embracing people from foreign lands, show them what it is to be Australian. Assist them in getting blind rotten drunk then vomiting in the street or peeing in the doorway of a public building. When not drunk drive down a suburban street and shout obscenities at anyone who doesn't look Australian (meaning white, sunburnt and wearing Billabong shorts). When you're around your newly Australian friends make sure they realise they're not really Australians because they weren't born here but that's okay because you tolerate them anyway.
Step 3. Cling tightly to the belief that Aboriginal people are all lazy recipients of centrelink payments and would kill you given half a chance. See their children as just another way for a teenage mom to collect more government handouts without needing to work. Ardently refute that they face any discrimination at all by pointing out that Ernie Dingo is a TV presenter on the popular travel show Getaway. Well, if one guy can make it surely the rest are just turning down good jobs for no reason.
Step 4. Impress your Asian coworkers by ordering laksa for lunch then telling them how much you like Japanese food. Point out you've had several Asian girlfriends which practically makes you one of them. Regale the office with stories of your drug-hazed nights in Bali and how one time you woke up next to a man...but 'you're not gay'. By the way, it's always appropriate to proposition Thai waitresses at the local eatery.