Hi
Converting your licence is not your biggest obstacle - immigration is!!
Don't go wasting your money on exams and flight tests until you have a visa giving you work rights.
Pilots are not on DIAC's occupations in demand list so you will not qualify for a visa with work rights.
This subject has been raised many times before and still people are falling into the trap, thinking that they will worry about a visa later. They now have an Australian licence but are back in their own country trying to figure out how to get a visa to come back and work!!
Good Luck