Divi Theme Documentation
Often using DIVI from Elegant Themes as the main theme for their websites. It so easy to configure and use. The options are endless on what you can do with it: basic content, landing page, blog, contact page, portfolio, pricing page, projects... etc. You name it. DIVI is very flexible. But, it is true that, at the beginning, it can be hard or confusing to understand the principle of ROWS and MODULES.
Hopefully, Elegant Themes has set up an amazing documentation page for the theme with videos for each module. So if you want to learn DIVI, go to http://www.elegantthemes.com/gallery/divi/documentation/