is there some setting somewhere ( like the keyboard thing) that I should change because I'm in Australia and all these guides are English or American?
Australia uses the US keyboard layout, so even that variation is unimportant.
It is best to diagnose each problem at depth rather than hope for quick fixes. Happy to help you diagnose, but I'd need to know what happens. Try another network, so that you can identify if the problem is due to your network and not the Raspberry Pi.