Helen; beautiful stuff!!!! My ideas to add to Chris, who is tireless and fantastic.:
Tags!!!!!!! Work on your tags. This is what you have on one of your prints: Art, Painting, Print, Art painting, painting print, original print, valentines, gift ,red, pink, cream ,Giclee, abstract painting ,print ,whimsy, floral.
That is ok, but I would do two things: Add a name or description to your paintings, so you have something for the title. I don't care if you name them for moods, seasons, music notes, colors, cars, or cats, just name them!!!! It makes them so much more personal, and makes it easier for people to remember which ones they liked. Then, the phrases need to be more phrase than single word. No reason to have Valentine's, unless that is your reason for or muse to paint this one. You can put that in occasions, if you would like, but leave it out of your tags. Think of the first 13 things that people would type to get to your specific print. Since you have a bunch of similar items, you might want to put groups of tags into a document so you can copy paste them into your listings, with just the changes you need for the specific one you are listing. I would recommend some of these: original art print, acid free paper print, giclee art print, print by artist, and so on. The colors you can group instead of having them individually. Think of several basic groups of tags. Use each group on a print. Watch your stats, and see which group of tags gets the most views, which tags work best. Add those tags to all your listings, and edit some more, until you are happy with the results.
Your descriptions are good, but a little coolish for me. This is an artistic community. People who shop here want artsy special things that make them feel good, so make your description warm for them. Give them a reason to spend their money on you. Let them feel that they are special because they like your art, and it should be an honor for them to have it in their home or office, which is all true, so figure out a way to say it!
You own the store. Spend some time making it profitable and welcoming!
I admire your style!