To work in USA I would need a Green Card.
Same for you if you want to work in Europe or Australia (Or at least the equivalent at Visa).
You might qualify for a working Holiday visa for Australia.
To convert your licence you need to pass the CPL Air law exam a CPL flight test and then an Instructor Rating Flight test.
All for 12 months temporary employment. Oh and with Two seperate employers minimum if I Remember Correctly.