If you're now in Australia, it is polite to ask "where y'from" as a starter convo, as knowing who your mob are is part of getting to know you. An Aussie would find the answer [insert country name here] as pretty standoffish (sort of an "I don't want to talk about it or be friends with you" answer) but if they were determined to get to know you they might then ask patiently "where in Canada?" or ask about the part of Canada you might originate from, knowing it is a large place. This helps them to understand who you are and work better alongside you in big projects in future. Unfriendly people aren't really worth working with or helping out if the going gets tough.

Think of it this way: If you have spoken four words to someone "Canada" and "why do you ask?" they are less motivated to cover your shift. If they know you are from that cool place with several excellent bands and a beautiful landscape and you often chat about whales or whatever, they might try to help you out. Also, how cold and bleak your life would be without the occasional conversation with someone at least once a day. Many people live alone.

How do you first get to know your work colleagues? Ask about a sport or the weather? Or ask about something else? Is small talk and office acquaintances not a thing where you are from?