The easiest way to listen to good music is to pick your genre on PBS community radio down in Melbourne:
https://www.pbsfm.org.au/programs/list
Click it, find the recent past episodes list, pick a recent episode and click the "listen" icon next to the episode titled.
- Find the show and past episodes
- click the listen icon thats directly next to the title of the episode.
Personally I like Soak for real calming music:
https://www.pbsfm.org.au/program/soak
Underground love for really new music:
https://www.pbsfm.org.au/program/undergroundlove
And Ear Of The Behearer for really out there psychedelic and experimental music (but maybe skip past the theme song):
https://www.pbsfm.org.au/program/ear-of-the-behearer
But if you really only want to listen to Australian artists, there's homebrew: