Hi Ashley!
Your shop looks great, I know you already know that, but wanted to let you know what I see! I'm not really getting sales myself, but 2 things I can bring up.
1. Are you on any social media? I didn't see any listed in your about section. Pinterest is great. If you are on there (and any other sites), list them in your About section and your profile. And use them to promote not only yourself, but other things.
This makes me think of one other thing, your own blog. I have had a blog for quite a few years and it is under a different name than my shop, but I do have a widget on my blog for my shop. I get views almost daily from it. So if you have a blog, add a widget. If you don't have a blog, perhaps start one. Personally I like to find DIY advice or How To. Perhaps you could do something with a blog in that direction related to your art and cards.
2. Marketing
There is another team that is led by one person and she posts a link, once a week (haven't seen her post for this week yet) with really helpful advice on marketing. She also sells ebooks that are full of helpful marketing advice. I bought one and am SLOWLY going through what she suggests.
Here's a link to her team:
https://www.etsy.com/teams/21227/hot-marketing-tipsAnd a link to her shop:
https://www.etsy.com/shop/AttentionGettingI bought her ebook for Children and Babies shops and found it helpful (as already stated).
Cheers!