Sorry for the confusion. We recently pushed out a change to the Wordpress on App Service creation experience which simplifies the configuration for Wordpress. In the old experience you needed to specify database information, but in the new experience that is no longer required. Instead we now choose a configuration that we know will work well for you to run Wordpress with the least amount of issues.
In the meantime we're also working with the folks who own different learning modules to get their training updated. To be sure we cover everything though, would you mind also providing a direct link to the learning module you're following so that we can make sure it gets updated as well please?
Thanks,
Elliott