Here is a complete how to on WordPress Blogs. This is very detailed on how to use WordPress.
Chris Abraham walks you through how to join the fastest-growing and most elegant free blogging services, wordpress.com. Go from the simple acts of joining all the way through set up and administration. Become a blogger in less than and hour. Most folks only need the first 15 minutes to get you started. Chris is a professional blogging instructor. Enjoy! All of you have been asking me to update my step-by-step tutorial on how to use WordPress.com as a blogging platform — please check it out and please let me know what I have missed.