Canberra Uni? Do you mean ANU or another university in Canberra?
If you're going to ANU, don't worry majority of the undergraduate population is from interstate and in the same boat.
If you're going to another uni in Canberra like the University of Canberra or the Australian Catholic University...well...being brutally honest, most people going to those universities are just locals who didn't get a high enough ATAR for ANU and didn't want to move interstate. That said I imagine UC attracts some people of regional areas who want to escape the country life. But I don't think not knowing anyone else going is a thing to worry about. I mean you'll make new friends, etc, etc.