relocating sidebar

I installed a “Mint” flavored theme https://thewordpresspro.net/2008/01/14/mint-web-20-free-wordpress-theme/ and works fine but, I’ve been trying to figure out how to move the sidebar from beneath the page content (where it looks like a footer) to the right side column.

I’ve checked two column themes to compare what I want but, everything I do to change the sidebar turns out wrong. What am I missing (aside from having a beginner’s knowledge of PHP)? I’m looking at the code and where the sidebar should go but, when I move it, the sidebar breaks the site and, I can’t seem to get the items in the sidebar to flow vertically.

https://www.oceanviewrickshaw.com/pedicabs/

I read documentation on pages, sidebars, changing themes, theme development, stepping into templates, and various people’s sites. Am I overlooking simple, like not seeing for forest for the trees?

Thank you for any help!