It starts with the preschool education which is not compulsory and can be offered within a school or separately. The primary and secondary school encompasses the compulsory education for Australians. There are a large number of primary and high school across the country with most of them being public schools.
One convenient thing about being an international student that is going to Australia to study is that you can pay your tuition fees before you even start attending. This will help you with budgeting during your schooling and it can also help you with saving up money for your education before you even end up in Australia.