The more I hear about that country, the more I wish I had a transportable career.
You'd have to start prouncing z as zed and spell a few words differently. They drive smaller vehicles and on the opposite side like the UK. The banknotes are wild colours and come in different sizes depending on the amount. Start liking cricket and rugby compared to say baseball and football. The seasons are opposite the US. Christmas weather is like July 4th. The Liberal party is actually the conservative one down there. Labour is the socialist one. You can probably fake or learn the accent and lingo over time but you will stand out with an American accent. Its population is quite small in comparison to the US. You better know the metric system or you soon will since the old imperial system is pretty much gone. Its a great place nevertheless but it is different however you slice it.
Hope you aren't a gun owner.