Before you sign up to get started with Wordpress, it's a good idea to peruse the Wordpress site and generate some ideas for your blog. Click on the Discover Wordpress button to read the Freshly Pressed page and learn more about Wordpress there.
The next few pages can be used as a checklist to make sure you have what you need in place before you actually start creating your blog. Or, if you are ready to begin, you can skip to the Getting Started section.