Here is a great activity, check out your local council for advice on what is native in plants to YOUR actual area and plant THAT!
Another very important thing is to look after our Native Bees. Planting native flowers is one way, and also think about keeping native bees (introduced bees take the pollen from our natives). They don't produce much honey, true, BUT lots are stingless (bonus!) and they are under serious threat.
This is where to buy them in Australia if you are interested PLUS it's a great site with loads of information and again, ask your local council for more information.
Have a fantastic day! xx