Nested pictures trigger larger picture - Pay for help

I am trying to use the nested collection to click on a thumbnail and then display itself, like a lightbox but controlling the size of the image. Similar to Amazon. See the attached image. The pictures are all in the CMS database. If you look at my example site page you can see the thumbnails. They come from one record with multi image field.

I am a novice for Webflow and don’t quite know how to tackle this. I realize it will need coding to handle it. I can pay if the cost isn’t too excessive.

Full Read Only

Here is the sample page Read-Only:

The link you shared is not site ‘Read-only’!

I have updated the post to show the read only for the site and also for the page