Can't get text over image on home page

I don’t know why I am struggling with it so much. I am completely unable to figure out how to get the main part of this theme to work for me. I used the easy page builder because I know nothing about programing.
This is my website. I made do with what I knew… hyperlinking an image. But I have no idea how make the images get text to go over top when I hover over them. I’m sure I’m missing some rudimentary step, but would still love some help with it. Thanks ??

kendall-king.com