To tweet or not to tweet?

I'll admit it. On my blog of all places. I'm scared of Twitter. I feel like my parents' generation who was scared of Facebook three years ago: I don't understand it. I don't know how it works. But I think I'd be good at Twitter. I'll have a thought and think it's funny. I could share it with others, and others might think it's funny. Others might think I'm funny. Is it possible Twitter is already passé and I am too late?