Trying to figure out twitter: HELP!

A few months back, I got on the twitter bandwagon and decided I'd see what the big fuss is about. At this point, I'm not overly impressed with it; not because I don't think it has its potential.. I just don't know how to use it for what it's worth. Apparently it helps with networking but being on Facebook for so long, I'm not really sure Twitter can do anything that Facebook can't. Twitter's apparently something that you update regularly to let the world know what you're doing and 'tweets' are frequently updated so that depending on what words you use in your tweet, people can find what you're saying about a particular thing. I don't really understand what Retweet is all about but from what I've heard, apparently it's "rude" to make someone else's tweet your own and to give them credit for it; you "retweet"... I want to network. I want to interact with people all around the world and talk about issues I'm interested in and while I know Twitter can help me with all that, it's not very beginner-friendly; at least not to me. Someone out there... Explain to me please how to make Twitter work for me.. Work with me; I'm a noob, sorry.

- David Javier Solis

P.S. "Follow me" at DavidJSolis