Hi Madison,
I can relate to your question as I have gotten back to selling after a 2.5 year hiatus. Things are picking up, albeit slowly, they are picking up.
Much of this is due to the SEO on each listing. It's all about the title and the tags. Whatever your title, you should make sure all of your tags have the words from your title in there. Lots of my time goes into searching the best titles for my given area of sales. If you sell similar things on your site, you will build some great momentum on your shop for the given keywords you use.
Also, adding more listings makes a great difference. I'm still not where I want to be, but it's a goal. And while I'm at my goal, I make sales, so that's been very nice.
Social media I focus on Instagram , Twitter and Facebook and Pinterest. I have different desired results from those, though. Like Facebook is more about just being on there in case, like general exposure. Whereas with Instagram I'm on there to build more community around other artists and vintage lovers.
Social Media posts: basic really. Except that I try to add a little bit of my personality into the post and focus on the keywords I want to organically reach people through.
Hope this helps a bit. Your stuff is super cute!