I'm no expert in photography, Brenda, but I noticed that Stephanie has se tup some of her minuature paintings on easels with a prop, to show size - that also makes it easier to compose a square picture.
Of course, you want a close up to show the details as well, but if you can catch someone's eye with the first image, they will want to click on the next to see the detail.
The other thing I notice, is that many of your photos are are a bit dark. Are you able to tweak the brightness/contract etc on your images? I always struggle to getting a good light for photography but you don't need any very fancy photo editting software to be able to make a big difference.