What is the polite way to proceed when introduced to Australians?

Extend the hand to handshake and with a cordial smile say g'day.

Genuine and non pretentious is always appreciated here

G'day mate. Where's Walkabout Creek? Dundee around?

throw an odd, slightly off color joke with liberal use of puns. and be prepared to get back at least as well as you give.

Ask if they are going to put shrimp on the barbi.

The few I have met are very down to Earth 🌍 and easy to be myself around.

Do NOT ask them what part of Austria they're from.

Alright ya c***t!!!

You can trust me, I'm married to one 😂😂😂

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Grab them down under, I imagine.

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be yourself, if we insult you, it means we like you

Some typical greetings are, "gday mate..hows it goin?"..to which you reply "good thanks mate, yerself?"..or, another is, "hows it hanging?"..same reply.."good thanks"..or, "no complaints..who'd bloody listen anyway"