around Cottesloe and Scarborough is a good option as these are the two main sailable spots on the ocean IN Perth. So that you are only 5 minutes from your soon to be local spot for the week day/evening session.
Cottesloe (Dutchin) is a good wave spot in winter and perfect bump&jump/little wave spot in summer (and good friendly atmophere)..Scarbs is a beach break (more shore break style) so the waves break really close to the beach, but lots of people like it.
But it depends where you work, some people also live at the very north of Perth like Joondalup/Ocean reef and then you are only an hour away from Lancelin..
Remember there's no wave spot as such in Perth you 'll need to drive for that Lancelin-Greenhead-Geralton-Gnarloo..or Mandurah-Margareth River-Esperance
Rent in Cottesloe is a bit more expensive but you could still find some cool little place.
good luck!