Two Columns | Mobile View

Site URL: https://www.campervancooperative.com/cowritten-blog/make-the-earth-your-playground

Hey! Been way down the rabbit hole on this one and just can't figure it out. I'm trying to basically advertise my own products in a side bar on my blog posts. Obviously no trouble making a column that serves that purpose in desktop view, but 98% of my traffic is mobile. I think it looks sloppy to have this type of content vertically aligned under my main content and just want a thin column where I can have product blocks and other calls to action next to my content working on mobile.

Below is what it looks like on desktop (having totally filled out a full content bar - but you can see what I'm going for). On mobile I'm looking to create two columns as well. Just a text block next to other content blocks.

Thanks in advance to anyone who helps with this!