There are a lot of people with economics degrees in Australia. Just because you may pass a skill assessment, you still need someone to hire you.
What sort of work do you currently do, what sort of qualifications do you have? My first step would be to look at the websites of the large companies that hire economists eg the banks, accountancy firms etc. I’d also probably visit Australia as well to get a view on what’s there.
If a company wants to hire you, they normally can figure out a way, even on a temporary work permit.