WooCommerce
https://www.youtube.com/watch?v=tcc-BGo45rQ&t=26s 

https://woocommerce.com/document/installing-uninstalling-woocommerce/

https://woocommerce.com/document/woocommerce-memberships-quick-start

https://woocommerce.com/document/woocommerce-memberships-import-and-export/

https://woocommerce.com/document/flat-rate-shipping/

Name Your Price

https://www.wpbeginner.com/wp-tutorials/how-to-customize-woocommerce-emails/