Thank you for reaching out! We admire your willingness to volunteer!
While the minimum requirement to start a chapter is 3 years membership, you can still volunteer with other chapters and they may have some opportunities to volunteer virtually. I would recommend connecting with the other Australia Chapters to see how you can help.
Additionally, if there is another member in your area who has been a member for more than 3 years they could submit an application and you could be an officer with the chapter (there is no minimum requirement for volunteering as an officer of a start up).