Help! Trying to add my own images to trial site

I am using Nevins template in my free trial, trying to add my own images and I cannot figure it out.  I did get all my images into the asset library. I reduced the Home Page to 3 images which will take the viewer to the artworks themselves.  But I cannot find a way to replace the template images.  Edit section does no mention.  I am very tempted to abandon the whole thing.  Would starting with a blank site be easier?  I am so very frustrated and feeling stupid.