This is one interesting video? It is a great step by step (and slow) video about how to create a wordpress.com blog.
Here is the Official WordPress help section with lots of information. There is a ton of information out there about using WordPress, so here I give you the “Getting Started” section of the web. That seems like a good place to start. If you need to watch videos about using WordPress, here is WordPress.tv with lots of stuff a beginner probably won’t need. But you never know?
If you just want to get right to it and sign up, go here.