How do I get started when my Drupal Starter Kits website is empty?

Enable one of the following modules:

• Drupal Starter Kits Public Sector Demo: It enables a complete website with a functional homepage, content detail pages, landing pages for all content types, built menus, and more. Note that this is for demonstration and training purposes only and is not meant to be a starting point for building an actual website with Drupal Starter Kits.
• Drupal Starter Kit Starter: It enables a small set of starter content and templates. This is meant to be a starting point for building an actual website. Note that it requires deleting some of the starter content because it is a filler.

After you get familiar with Drupal Starter Kits, you do not need either of the two demo content modules, and should be more comfortable starting from a blank canvas. However, you might still find some helpful things in Starter.