Good idea. It will depend where you settle in as to how near you might be to a club which shoots .22 benchrest. Very much a game of chance but in general travelling around is a lot easier than in the populated parts of UK. You soon get used to travelling bigger distances to access what you want.
If you are going to be near Melbourne I can give you some details of who to contact when you are ready. If not there then each State has it's own Association & their details should not be hard to find on the Internet.
Good luck for the future, I found it a great country to live in once you adapt to their way of life.