Hey Kate Knowles, welcome to the Shopify family!
After taking a look at your website, I have thought of some feedbacks
1. Add a background theme or a simple, beautiful, clean web design to showcase your artwork. This will help boost your sales
2. Invite customers to be part of your community. I see that you have a blog so keep getting fresh content out once in two weeks and this will allow you to drive traffic, help in starting conversations and build credibility.
3. Add some kind of stickers to showcase stuff like trending, running out fast, back in stock, hot seller etc. Apps in Shopify app store can help with this by making the process very easy & simple. Also having some more trending or sale products in Home page will quickly grab customers attention. It'll also boost your sales.
Try these feedbacks out and if you want more help, feel free to message me back anytime :D
PS: CoVid offer for all stores at https://community.shopify.com/c/COVID-19-Partner-Offers/Free-Credits-for-In-Store-Conversion-Sticker...