Linkded in

I spent the day trying to figure out this LinkedIn thing. I'm not sure I get it. I have a feeling it could be useful to me as I try to get the Rose project off the ground, but I'm damned if I know how. I connected with about a million people, but now that I'm connected I have no idea what to do. Do I post things? Or what? It's all very "professional" and "business", and other stuff with "airquotes" around it. I guess I'm basically hoping that somehow it will lead me to people who want to invest in my project. One can dream...