FYI: WooCommerce comes with a default set of templates that are as 'clean' as they are ever gonna be. Just remove (or rename, of temporary check) the /woocommerce/ folder in your theme and WooCommerce will fall back to using the default templates of the plugin. If there are issues visually, you can look into our documentation on how to ensure compatibility with third party themes.
That is pretty much everything I can offer for clients with no budget, unfortunately.