i am final yr med student, what kind of exams will i have to clear before getting a job as a PG in Australia and what are the chances ?

I am a final year medical student from Pakistan, what kind of exams will i have to clear before getting a job as a PG in Australia, and what are the chances of getting it, for foreign students?| What are the requirements and how early should i apply? Apart from that what other job options do i have