Twitter-deficit Disorder

I have been diagnosed with Twitter-deficit disorder officially now. For the past two days I've been trying to find out how to follow Hugh Hewitt's "twitter" stuff and twitter on it. Hewitt thinks that this whole twitter thing and its evolution is the future of the Republican Party. I don't get it. I don't get it. I DON'T get it! And even the help section is no help at all. I think it might be too late for me to hop on the twitter train!