A Blog is an easy to use web site where you can share thoughts and ideas on just about anything. It's FREE and rather easy to use.
Once you have established your account, you can maintain more than just one blog. You can have many blogs, each with a specific theme and purpose. Givien this fact, there is no need to stress yourself or worry about "what will my blog be" right now.
Follow the easy 3 step registration process, without worrying about what you will call your blog or which template you will use. I will talk about the templates later on. Just pick any template to begin with.