Hi Charles, Welcome to Zoobird! The next step is to join the groups you like. Like, Bike Zoo.
Then you'll be in on what goes on in each group. You'll get an (occasional) email to let you know when someone updates a group with a new discussion, photo, video, etc. You can turn those notifications off, too. But, mainly, by joining a group, you become friends with the other people in the group.
All the best - hope you post a profile photo and some photos of your favorites.