Drupal is one of the more popular CMS applications currently available and can be installed from your cPanel automatically through Softaculous.
What is Drupal?
From http://drupal.org: Drupal is an open source content management platform powering millions of websites and applications. It?s built, used, and supported by an active and diverse community of people around the world.
How can I install Drupal?
The first step in getting started with Drupal is to install the software. Drupal can be installed automatically from your account cPanel in Softaculous in only a few clicks. Please see the following like for more help with Drupal installation: How to install Drupal using Softaculous
How do I use Drupal?
After you've installed Drupal you can begin using it to build your website. There are many resources online to learn how to use Drupal, but you may want to start out by reading the official guide from drupal.org: The Drupal Cookbook (for beginners)
Further Drupal Documentation
Besides The Drupal Cookbook (for beginners), Drupal provides much more documentation for using the software which you can find here: Drupal Documentation