Where can I play bitcoin in Australia?

Could you please elaborate on the availability and legality of playing with Bitcoin in Australia? I'm interested in understanding the various platforms or venues where one can engage in Bitcoin-related activities, such as trading, investing, or even gambling. Are there any specific websites or apps that are popular among Australians for Bitcoin transactions? Additionally, are there any legal considerations or regulations I should be aware of before engaging in Bitcoin activities in Australia? Thank you for your assistance in clarifying this matter.