Send emails to users who have completed the forms

my next goal is to utilize emails so as to direct submissions to users who
have completed forms

You can create an Auto-Responder email so that the user who fills up the form will receive an auto-response message. Please check these helpful guides:

Creating-a-Form-Autoresponder

Explanation-of-Email-Notification-and-Autoresponder-Settings

If you have any questions, let us know. Thank you.