See also: https://gafferongames.com/post/what_every_programmer_needs_t... https://developer.valvesoftware.com/wiki/Source_Multiplayer_...
I think it's very rude you suggest I don't know people in Australia (do you even know someone from Australia?)
On a similar note, I used to play World of Tanks with around 400ms latency before I got a better internet uplink, while it's certainly bad for a month, you start to get used to it eventually and the brain compensates. Of course, if reaction time matters you loose, but you can adapt your playstyle in a lot of games so that pure reaction time doesn't matter as much.
60FPS works surprisingly well, and for single player games you probably wouldn't even notice the input delay.
Stadia is most likely much more optimized.