Pop Up Form - Page Already Built

I’ve watched and read articles on how to create a pop up form.

However, my issue is that a developer already created the infrastructure for the site, so I’m not creating from scratch.

I could really use some help creating a pop up form built inside of the current infrastructure.

Also, can you duplicate a landing page so you can split test (drive traffic to two different versions of the same page)??

Thank you so much!


Here is my public share link: LINK
(how to access public share link)