Prep enrolments in Perth.

Packing up and moving interstate.

Hi there. My self and my family. (Partner and children) will be leaving our home town to move interstate to a bigger city. The current city we live in is a dry end. I've been looking for a job for months. Applying daily and taking resumes around weekly.
I know where we move jobs won't be a problems. My only concern is schooling.
I've just gone through the enrolment process for my daughter to be accepted into a private school here for prep next year. (Just in case we didn't move) Only thing is I'm worried when we move we won't be able to get her into a private school in Perth, because we only just made the enrolment for next year here.

Guess my question is. Can anyone tell me how Perth schooling enrolments work especially prep? I haven't decided on which school yet so haven't rang any to ask. So thought I'd check here if anyone knows first. In qld you had to of enrolled by end of November 2014 for prep 2016 kids.

Thank you