Auto adding favourited images to enquiry form

I’m using Jetboost to filter and favourite images from a collection. I need users to be able to add these favourited images (max 6) to an enquiry form. Is this possible using jquery or possibly third party integration such as Zapier?

This is a feature needed to be brought over from my clients old site build in WP – First Step Designs | Contact

Can anyone help with the workflow on this? If it needs to be custom code, we’re happy to outsource if necessary.

The site is still being built but here is the read-only link:

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