RE: Junk Art: We all have "junk" art. It's part of the process of becoming a competent artist. I once had a college art teacher say to me, "This is a college level class. If you were writing a paper, you would write a draft first, then you would write the finished paper. You're expected to do drafts of your artwork, the first attempt is not necessarily the final piece of art." Much of my art is just practice, although at the time I make each piece I always have high hopes it will transmogrify into a great masterpiece. It helps to understand that the practice is part of the improvement process, it's an end in itself, like being a pianist and doing scales to improve your musical form.
RE: What sells... we all wish we knew. Some of us have established niches of art that sell, but I'm willing to bet it's mostly a process of trial and error. You try this kind of art, people don't buy it. You try that kind of art, it sells. It's really a function of who sees it, and of the people who see it, how many people have the money and want to own it. Not a helpful answer, I realize, but that really is how I figure out what sells. I throw stuff out there and see what sticks, and I try to show it places where people will see it who might want to buy it. All those shares and views suggest to me that this one might be a good seller - but having people view your art, and having people buy your art are not always the same thing. I don't see a Fine Art America watermark on your piece... you might want to take some steps to make sure people can't get your art for free too easily, they won't buy what they can get for free.
If you have a really thick skin, you can post a piece and ask us to critique it. I don't critique photograhy, I don't know anything about photography, but there are lots of photographers here who are willing to give you some opinions and pointers.