Home Page Grid: Farben Basic

Firstly, apologies for this newbie question. I am struggling to set up a homepage grid of images shown just below the Jumbo headline.https://www.ads-software.com/themes/farben-basic/

Do I need a separate plugin to get this to work? I assume it is a grid of several images. I am at a loss how to set this up.

My site currently displays the header, Jumbo headline and blog posts. But I prefer it to display image grid instead of blog posts. My site is not yet pretty so have not included the link, but you get the idea.

Appreciate any help. Many thanks