Do you have a nursery that sells indigenous natives anywhere near you? I've found that many natives that I plant don't survive coz although they're supposed to grow in Australia, they're often not happy in our specific local soil and climate. Anything that I've planted that's MEANT to be here... that would've been growing on this particular hillside back when it was a forrest... that stuff just thrives. Even with minimal TLC.

I've found that often people who work in these small, local nurseries are pretty passionate and knowledgeable so you may be able to get some great info and guidance about how to make your particular location and soil-type sustain happy, healthy plants and maybe even some local wildlife! Good luck!