NEED HELP ADDING DYNAMIC CONTENT

Site URL: http://www.radicaloptimists.com

Hey all, 

I need someone to help me add dynamic content to my side hustle site. 

If you go to the homepage www.radicaloptimists.com you will see the last secton: Peruse the Blog. 

Underneath that you will see three BLOG POST GRAPHICS (one says 'Everyone has a plan' for example). Is it possible to make this section DYNAMIC so that it shows the latest three BLOG ENTRIES? If so, how much would you charge me to make that happen? I know enough HTML to be dangerous, but not to this level. 

Thanks in advance. 

Squarespace will let you do that already, if you set a summary block to the blog, set it to be 3 blocks wide, with a max of 3 items, it will pull the latest 3 posts.

Thank you!