Create an Event Registration
There are two steps....
1. Create the item for sale - the registration
This video explains how to set it up.
A. Try to set the sku to something related to the event. Ex. youthretreat2018, reallifegospelfall2018
B. Below the "Add to Cart" button, add the text
ONCE YOU'VE ADDED YOUR REGISTRATION TO THE CART, FINISH YOUR REGISTRATION BY CHECKING OUT IN THE CART.
It should look like this...