Print customizer for users? Options?

Hi everyone! Im new to Webflow but im looking to make a site with a simple designer tool built in so that users can create A4 size prints from templates and download their designs as PDFs.

No need to integrate with a print-on-demand service. Infact, itd be something the user could take and go print on their own. So just generating the print file for the end user. A lot of the POD are too heavy for my purposes.

Any ideas on how i can do this easily?? Im on the verge of desiging my own in bubble, lol. But i dont wanna reinvent the wheel if something already exists. So what do ya think? Any lightweight, print design tools out there?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)