Assuming you can work in Australia, then your plan is reasonable.
Most people get their CPL/IR out of the way and then head "North" to the Kimberley etc for the season. Then return to Perth/Sydney/Melbourne to sit the ATPL exams. That's one way. Or you can do them before you head off looking for work. Ideally, you want them done before looking for a twin or turbine job.
Other folks get Instructor ratings. This can be a good strategy if you can gain employment soon after.
Good luck.