Hi @ebo8302 ,
Thank you for reaching out. It is not currently possible to disable the default order confirmation email that is sent out when a customer completes the checkout process, with this email serving as the customer’s receipt following their purchase.
If you are not happy with the default order notification even after making edits to the template of the notification, you could perhaps change the wording of the default notification to notify customers that this email is simply a confirmation of the order with a second, more detailed email to be sent to them soon after. It’s not a perfect solution but as the default order confirmation email cannot be disabled this might be your best option.