How social media works?

[zidiane]

Hello. I'm 20, and I'm pretty sure it's basically blasphemy for anyone my age to not know how to use facebook or twitter or whatever else sites are out there... but I don't. Those kind of sites never made sense to me, like I didn't grasp the core purpose behind them, so I never did any of them. However, it's been suggested to me that I make a facebook page for my line of work, but I don't know how to work these things. How to go about meeting other people or updating statuses or what else to put up there. I'm a writer, so I'm making a freelancing facebook page (And if I can manage that, a twitter probably). Need a little help knowing what to do.