Hi Sarah,
Thanks so much for reaching out!
I’d recommend starting off by taking a look at our Themer’s Guide, which can show you which templates can be edited and copied in order to achieve the results that you are looking for.
The tickets email comes from our plugin, however the confirmation email does come from WooCommerce, so you may have to customize through WooCommerce.
You may also be interested in this blog post on how to customize the order email:
https://www.sellwithwp.com/customizing-woocommerce-order-emails/
Also, here is an extension that you may be interested in:
https://theeventscalendar.com/extensions/add-event-and-attendee-information-to-woocommerce-order-details/
Let me know how that goes and if you have any other questions on this topic!
Thanks,
Jaime