WordPress is installed and running, and you’ve logged in as the administrative user you created during the installation process. I bet that you think it’s time to blog about something, right? Not so fast, Sparky. First things first: You need to create a user account for yourself.
Why not just use the default admin user account that was created during the installation? Many people do because it requires the least effort (we’re all lazy people, when you come right down to it), but best practice is to use that admin account for administrative tasks only. That way, you don’t have to do any tricks to get posts attributed to your name instead of the admin user name; all the user roles are clear from the get-go.