Hello! I read on the Help page that I could join Groups and I followed the steps but the only option i see available on the Group page is "to request a new group" or to go back to the Help page. I don't see any existing groups. What am i missing?

Click on Groups. Click on the red Group on the left that you want to join. That will take you to the group and then you can join.

Click on community at the top. Under that are the groups. Click on that.