Attending a seminar...

I'm going to take an "official" class to learn the ins and outs of Facebook, Linkedin and Twitter. I have registered for all these but I have to admit, I'm not real familiar with Linkedin and Twitter. I think I have sent out a Tweet but don't think I have any followers so why bother. And I do have a Fan Page for Show Biz Photo and at last count I had 14 fans! If I ever figure this all out I could be dangerous. I guess since I'll be working in the ultimate techie place, I should be more familiar with this stuff than I am.