Perth is very suburban - you are not likely to meet many people beyond your immediate neighbours unless you make an effort. My tip for making friends is to join something. Being Australia, sport is the obvious choice, there is 'parkrun' here like in the UK which is all around the suburbs, easy way to meet up with the same group every week. If you have kids you will naturally get sucked into the kids sport organisations, if not join a cricket club, soccer, aussie rules, netball, touch footy, waterski, surf life saving, landcare, river guardians, volunteer fire fighters, SES, St John ambulance, running club, cycling club, or a political party if you are desperate :-)