Hi, I checked out your site. I understand you need changes to the templates you mentioned. I can use the plugins you have, create custom PHP, re-design the templates based on that example. This is the process:
1. We discuss about the extent of the redesign (simple layout restructure or further changes)
2. I use your current theme and plugins (Storefront?) on my environment and work on the new templates there
3. I create a child theme (so you don't lose the new templates in case of a theme update) and send it to you, including the new pages, so you can just activate it
I'm a WordPress developer with years of experience and I work on WordPress sites (including WooCommerce), customizing and creating themes, plugins and templates.
The first step would be to let me know if you want to keep the current colors / fonts of the theme. Feel free to contact me.