3D FlipBook - Light box

Hi, I am not a coder, I use word press, and at the moment specifically the Divi theme. I am trying to add a book to my page. and I can do the regular shortcode and have the book centered. or I can do the thumbnail to open in a lightbox. but the thumbnail is so tiny, and I want the image to be larger, but open in a lightbox for a cool effect. I don't really want to have the book just centered on the page. is there something I am missing? where do you put the shortcode activation link? I looked through a bunch of already answered questions and didn't see an answer. and it isn't in the user manual. can I use that shortcode but attach it to an image you click on? it's very confusing.