Hey Sarah,
Yes, the order creation webhook will provide you with the information that you need.
Just a note... I've realized that you're probably talking about setting up a webhook through the Admin interface (Settings/Notifications), right? Just make sure that your email provider is able to do something useful with the information that you'll get from the webhook.
For popular email providers there are apps that would do all this for you, but I guess you're aware of that.
Let me know if you need more help with this.