Integrating Print Huddle into existing Squarespace website

Site URL: https://www.printhuddle.com

We are looking to implement some software from Print Huddle to integrate with our current website, and wondered if anyone has had experience with this in the past?

It would involve using a custom code injection with javascript - where users can edit text/images in the Print Huddle software, linked with the product ID (for example - flyers)

I have further information on the full process, which I am happy to pass on, is this something that can be achieved by someone with minimal development experience (like myself) or would need a developer to do this?