Instructions for authors
You need privileges to create new pages. E-mail me firstname.lastname@example.org, explain what you want to do and I will change your account to let you create pages.
Once you can add pages, edit the page and look at the Input Format options for details about marking up the text for headings, tables, etc. Page order is controlled from Publishing options, also visible from the edit page
(Somewhat) more detailed instructions can be found on the Drupal Web site