https://www.youtube.com/watch?v=vmL72sgVdAQWatch this and the rest of these over and over until you get mild brain damage resulting in a speech impediment.
Be sure to get your room as hot as possible.
Sip cheap boxed wine all the while. By sip I mean go through them by the dozen. Shit's cheap.
Switch over to the slowest traffic speed your ISP can possibly provide. For more authentic experience, switch to a crappy 2G USB modem.
I provide no guarantee that any of this will make you any closer to being Australian.