Sidebar + Shopify Categories

Hi everyone, really need help with this one.

I use Shopify as my online selling platform and integrate it into my squarespace website using the "Buy Button" codes.

However, the number of products is increasing so the site is becoming clustered with all the items. I would like to know if it is possible to have a sidebar with options to display each of my collections(types of products) For example, I sell coffee beans. So, instead of displaying all the beans at once, the side bar would have options such as Africa, South America or Asia and depending on what the users selects, those items would be displayed.

I am currently using a template that does not support sidebars. However, I have a fair bit of code injected so if I switch templates "just to see how it goes" I would lose all my work, so I would like to know if other templates would work, or how I can achieve that. I've noticed that the FIVE Template seems to offer sidebars on all pages. But can I set up the sidebar so that each option would display a set of codes from shopify?

Thank you very much!