Nowadays even for international schools e.g. ESF, KCIS, Canadian International, they all require interview as the applicants are overwhelming. I believe only a small number of international schools don't need interview. You may try KCIS, but it still requires birth certificate for the application.
For Victoria, you may apply their playgroup first. But for their pre-nursery or nursery, they still have specific application timeframe and you cannot submit applications in advance.