Twitter - To Tweet or Not to Tweet

I've had a twitter account set up for a few months, but just haven't been sure what to say...I got on today and posted my first tweet...and I'm still  not convinced. I read so much about social media and the power of it all, and I really want to get on board, but it's a struggle to find my voice in the "world wide web". It feels so vast to me! However, this is a challenge I want to take. Tweet - one at a time, until I find my voice amongst the other tweeters. See where it goes without having all of the answers up front. I am extending the hand of friendship to you twitter, let's see where this thing goes!