I'm in... but I've no idea what I'm doing

After a week or so of waiting, I have finally been invited to join Pinterest. And, I've already gotten one follower! Trouble is, I don't know what I'm supposed to do. I think it's about "pinning" on my "board" and looking at other people's "boards" and maybe "re-pinning" their stuff.  I'm just not sure. Still, it's a cool site and worth checking out, I think. As long as you can survive another giant time suck!!