If you don’t have Google+ yet you probably will soon as they keep opening it up to more people. That said there are mechanics to using it that are super helpful to know. Just like Facebook or Twitter when they first came out there is a learning curve to figuring out how to work everything in the program and because it’s new, not many people can answer your questions.
The good news is that Kipp Bodnar has posted a cheat sheet from Simon Laustsen that walks you through the basics that will save a ton of time. For instance, Google+ is just like Twitter in that the people you follow in your circle don’t have to follow you back. You can also send a private message to someone by disabling the re-share button.