You need to place one of the front-end news modules on the page that will display the news. The description of all front-end news modules can be found in the tutorial, page 68. Instructions on how to work with the news back-end module can be found at page 50.
You probably expected to see the news items that you entered to show up in the "News" section of the home page at the demo site. Please note that this is actually a RSS reader module that is used to display RSS feeds from other sites - in this case it is displaying the news from our main site.
Please let me know if you need additional assistance,