First things first! To start your Blog set up a WordPress account!
Next choose and add a Theme to your Blog post site. A Theme in a blog post is an overall layout of your blog which gives style, layout and function. To change the theme it’s simple. After you’ve set up your WordPress page go to dashboard and select Theme and choose any theme available or you can customize your own. I personally prefer twenty twelve for blogging as it has a better flow for the reader as well as it’s easier to work with and post.