Hey there!
Changing the product page template, or how WooCommerce outputs the product page, requires PHP changes to the template that WooCommerce uses.
Here’s our documentation on how to do this: https://docs.woocommerce.com/document/template-structure/
I can also recommend the WooCommerce Developer Resources Portal for resources on developing for WooCommerce.
You can also visit the WooCommerce Facebook group or the #developers
channel of the WooCommerce Community Slack. We’re lucky to have a great community of open-source developers for WooCommerce, and many of our developers hang out there, as well.