Lol yes it can be very, very complicated in the beginning. It might be a good idea to read through the guides and type the questions you have in the search bar. More than likely, you’ll find an answer to them.
In order to add the overlay to your story:
When you enter your script do -
@overlay NAMEOFOVERLAY create
@overlay NAMEOFOVERLAY opacity 1
So for you it would be:
@overlay EYETOP create (Or whatever you named them)
@overlay EYETOP opacity 1
@overlay EYEBOTTOM create
@overlay EYEBOTTOM opacity 1