Modifying Fresh Bananas theme

I apologize if this issue has already been addressed. I’ve poked around on the forums and haven’t found anything similar to it yet.

I’m in the process of modifying the theme “Fresh Bananas” to use as the main page of a comedy/podcast site. It’s designed to resemble a corkboard with items pinned to it, including the blog content. The main modifications to the background images and text formatting are done, but now the group using the site wants “cards” or other images to appear at random intervals on either side of the main content column.

It’s been several years since I’ve done any work with websites, so other than making small changes to the stylesheet, I’m not equipped to come up with a fix. Does anyone have any suggestions? I can only think to add columns or a div element to hold the side images.

The page is located at http://www.bluemilepodcast.com/, in case looking at the page gives anyone a better idea of what we’re looking for.

Thanks in advance!