How easy is it to make my big static site into wordpress

Hi,

I have been building this static site and it is getting bigger
and bigger, I just wanted to know how much effort it will
take to convert https://www.designerbabyclothes.org.uk into a wordpress site?

Each page has a main section, with a thumbnail that goes to a larger version of the product eg.

section page:
https://www.designerbabyclothes.org.uk/designer-baby-dresses.php

Click on a product eg. ALBUM DI FAMIGLIA and it goes to
a larger page: https://www.designerbabyclothes.org.uk/designer-baby-dresses/arianna-riga-striped-jersey-dress.php

This is the interaction for all of these pages.

Thanks
S