Melanie, you are most definitely a part of the Australia project, it wouldn't be the same without you!
Have you considered discord for communication? Because to be honest with you, I have been using google groups for a long time now and still don't quite get it. It is difficult to use I find. And having used discord recently for the global cemeteries project, and have proved the worst at getting the hang of it haha I am finding it overall more user friendly, intuitive, and aesthetically pleasing, which some Aus members have told me they prefer about facebook.
Just a suggestion.