Elsie,
Looking over your shop and profile, here are my initial thoughts:
1. Cute product! I like that it takes a second look to fully appreciate your illustrations.
2. Photo presentation is very appropriate. So many dishes on Etsy--and any site, for that matter--are photographed by themselves, or with an obscure object, such as a plant. Place settings make much more sense.
3. It's good that you have a return policy. And it is more than fair to make the customer pay for return shipping.
4. You must have a niche, since you already have a handful of admirers!
... Now for the things I think you have room to improve, if I may be so bold.
1. The more eye-catching pieces are the ones with a pop of color. Love the flowers, love the koala plate that says, "The Last Custard." There's a stylistic element there that the plain black-and-white ones lack. Consider adding that one element of color to more of your pieces.
2. In your shop policies, take a quick perusal for spelling errors. Obviously there are some spellings that vary between English-speaking countries; however, I believe that the difference between "accept" (to take) and "except" (excluding) is the same everywhere. Other things that jumped out were "hand made," which is one word, "accomadate," which I believe is universally spelled "accommodate," and "endevour," which I'm not positive is spelled the same everywhere but I believe is spelled "endeavor." It shows professionalism to have all spelling and grammar up to snuff, especially in all the places that you expect your customers to regularly see.
... Other than that, though, looks like you're off to a good start! Hope you find these tidbits useful and encouraging. Best of luck!