Where can a 13-year-old girl who lives 2 km from a small town find a job in Australia?
Tough question! You might try to find some services that you can do remotely. If you are a good typist, you may be able to do transcription work.
There is only one species of platypus (Ornithorhynchus anatinus) so the kind you find in Eastern Australia and Tasmania is the same one you find everywhere else that it lives. (Of course Eastern Australia and Tasmania is about the only place you will find the platypus in the wild - and note that Tasmania is actually part of Australia.)
The quokka lives in a limited number of areas of Western Australia. One of their healthiest populations is on Rottnest island, a small, protected island off Perth, the capital of Western Australia. The quokka can also be found in the coastal plain around the Swan River, near Perth and Gingin. It is also found on Bald Island, and at Harvey and Collie in the Stirling Ranges.