If you want to start a blog, WordPress is probably the easiest and most user friendly application you can use. There are even simpler options -such as using a free online blogging service such as Blogger.com, but then you really do not have much control over your own site.
With WordPress, you get the best of both worlds -an easy to understand platform and unlimited features that enable you to grow your blog and add bells and whistles as you learn.
WordPress.org vs WordPress.com
First, I should point out that