How to have automatic email sent to user after form submission?

Also, we a user hits the submit button, are we able to have an automatic email sent to them saying their submission was successful?

You have to add an autoresponder email in the form. This guide should help https://www.jotform.com/help/26-Creating-a-Form-Autoresponder.

The autoresponder email is automatically configured in the form once you add an email field. The email field is required for this to work.