https://www.google.com/search?q=pinterest+like+theme+for+dreamweaver came up empty. I do see templates for WordPress but given your own words I take it that you are not able to use those.

WordPress in my view is easier than DreamWeaver in that it's low code. Read https://en.wikipedia.org/wiki/Low-code_development_platforms and others if you need to catch up with this trend.

There are tutorials about crafting a page like Pinterest but these are code heavy and not acceptable to folk that are template shopping.