I am having a real hard time adding a single picture below a paragraph. The picture is only 300 x 350 pixels and it won't show up at the 471 breakpoint. The placecard looks small when I add the picture but the actual picture does not show up. Also can you explain the 4x3, 3x2, 2x1 etc means?. I wish there was more information regarding how to place photos

4x3 means size relationship. I found first to make sure you are less than first (small) breakpoint when adding placeholder. So if you are adding 300 x 350 use 1x1. then set you max width and max height. This will hold the placeholder to correct size.
Next load "User Guide for Foundation Framer" Read it through several times and the rest becomes easy.
Hope this helps.