Choose a Version of WordPress
If you want to start a blog or create a website using WordPress, you can get up and running in very little time by using one of the two different WordPress varieties. First you must choose which one. At WordPress.com, you can get hosting service and standard site configurations. WordPress.org offers blogging software for self-hosted blogs, and even for blog networks. If you are on a WordPress.org blog network through, say, your school system, you will find your WordPress experience similar to that of WordPress.com users.
Whichever WordPress software option you choose, you can change it later!