Student Visa (subclass 500 and 590) in Australia
With the Student Visa (subclass 500) and the Student Guardian Visa (subclass 590), intended for those who accompany students who do not reach the age of majority, you can stay in Australia for the duration of your studies.
You will have to prove that you can assume the cost of the course for your first 3 months, as well as the cost of one-way plane ticket.
In addition you must have underwritten student health insurance, which is called OSHC (Overseas Student Health Cover). Depending on your country of origin, you may also be asked to pass some simple medical tests.
Working in Australia with a Student Visa is possible under some requirements. The Australian Government allows students to carry out some jobs to pay part of their living costs in the country. You can work up to 40 hours every 2 weeks, which in practice means an a part time job. You can distribute those 40 hours among the 14 days according to your interests and agreements with the employer. If you go on vacation in your studies, you can increase the number of hours of work the following week..
Keep in mind that if you work more hours than permitted, you will be breaking the law and Australian authorities could withdraw your visa.