Hi,
Customizing WooCommerce emails involves making changes to their templates and understanding how to use WooCommerce hooks. Please note that customizations are outside the support we can provide in this forum. However, here there are a few steps to consider:
1. Override WooCommerce Email Templates: WooCommerce provides email templates that you can override with your own custom versions. We’ll do this by copying the email template files into our theme’s directory: https://docs.woocommerce.com/document/template-structure/#section-1.
2. Customize the Email Templates: Once you’ve copied over the templates, you can customize them to fit your needs. This usually involves some knowledge of PHP and the WooCommerce plugin. More details https://docs.woocommerce.com/document/introduction-to-hooks-actions-and-filters/.
3. Configure Email Styles from the Dashboard: WooCommerce allows you to customize the styles of your email templates from your dashboard without having to delve into the code. These settings can be found under WooCommerce > Settings > Emails. More details https://woocommerce.com/document/configuring-woocommerce-settings/#email-settings.
I hope this points you in the right direction.