Hey Leslie,
Lovely art, I just love your banner.
Selling on Etsy is really its own art form. It takes many stores a couple months to sell their first item on Etsy.
Obviously, the more items you have, the more likely your item will get pick up in a search and the more options someone has in your shop to fall in love with a painting and buy it. It was around 75 paintings in our shop that we started to get more regular sales (for us was 5-9 sales a month)
Learning as much about SEO is important for your shop to get found in searches, both Etsy and google. Making the most out of your tags is important. I am looking at one of your listings, and I see you have painting listed twice. Thats a waste of a tag. To make the most from your tags, use multiple words like "acrylic painting" as one tag instead of two. Use words you think people might search when looking for a painting. I would work on the titles also. Titles are important for SEO and help you show up on search engines. There are tons of blogs and even etsy teams to help you learn how to optimize your SEO.
I see you have a facebook and a twitter linked to your shop. I get a large percentage of views from twitter. Using outside promotion to your shop can really be important to your success. (pinterest, wanelo, twitter, facebook, tumblr etc.) Also getting featured on someones blog is a great way to get traffic to your shop. Sometimes someone will just do it without you even knowing, which is always great. But sometimes you can look for people who are looking to feature an artist etc..
Selling art as well, I have noticed that having a wide range of different priced items has helped. Having both originals and prints is nice because someone might like your work but it might not be in their price range. All the little print sales help keep you going until you get that next original sale.
Being active in the Etsy community helps. The more you talk in forums, the more other sellers see your shop, favorite things, which then shows up on their feed for all their followers to see. Making treasury can help get other sellers looking at your shop too.
Good luck!