Hi Dange -- The Network is closer to a social network (similar to Facebook, if you've used that) where you connect with individual people and groups, and post your own comments in your blog. We wanted to create something that would help people connect with each other for support (similar to our face-to-face groups), rather than a topic-based forum.
Once you've connected to some other members and groups, you'll be able to see all their posts on your 'home' page. Anyone you connect to will also see your posts in the same way on their homepage. I've sent you a contact request so you can see how it works. If you accept that request, you should then see my posts on your homepage.
If you want to see posts from other people in the network you're not connected to, just click on the 'latest network posts' tab on the network homepage. This shows the last five blog posts.
If you see something you're interested in, you can 'reply' to the person's post, and if you think it's someone you'd like to connect to, then you just click on their name (which is a link) and on the left side of the page you'll see 'add as a contact'. Click on that, and you can send the person a message and they can accept your request if they want to.
Hope that helps... Feel free to ask any time you're stuck.
Di