Hi Kelly-ann, CASA recently relaxed the licensing for Drones.
You no longer need a licence if the Drone is under 2kg. DJI have recently released the Mavic Air which is an awesome drone for the price and size. There are still some requirements you need to adhere to when flying the drones.
You can out more here: https://www.casa.gov.au/aircraft/landing-page/flying-drones-australia
Also this video covers using the drone commercially if they are under 2Kgs.
https://www.youtube.com/watch?v=zo69cZ4C5jE
Cheers, Geoff
