What are the necessities for Australian immigrants?

I'm not sure whether you are talking about the necessary documents for studying abroad or the necessities of life.

If it is a certificate, it is best to consult a professional intermediary company.

If it's a necessity, as long as you don't go too far away, such as Sydney and Melbourne, it's usually sold or expensive. Personal belongings, such as underwear, socks, toothbrushes, etc., can be brought by yourself.