I'm not much of a joiner but I have joined The Greens because it seems to be the only Left political voice in parliament and I can't see a revolution happening quite yet.
There was a socialist group in the area I used to live in Sydney but they seemed to be so formulaic in their communication, it sounded (to me) like they were in the early twentieth century. If you can't connect on a human level then spouting in-group speak is not going to attract people. (You are nothing like that btw.)
I'm glad you have found a group you are happy to be with. The Left often gets caught up in in-fighting and we need to support genuine work.