How do you become a social marketing consultant?

[dcnet]

I have a bachelors degree in Advertising and have a little more than a year of advertising experience. I have not done any internet marketing or social media marketing. I want to get into social media marketing but not sure how to start. I have done research and know the basics of what social media marketing is. But I want to know how can I get into social media marketing. Are there any certification that I can get online (preferably free)? It would be nice if there are any examples of how people have gotten into this business. All feedback is appreciated.