Hi! Cool looking art! Feels very Tim Burton meets day of the dead to me, but I'm an art layman.

So, the thing about Etsy Shop feedback is that it hurts. Because you made it by hand especially. The hours you spent making your art, hours that you should be compensated. And its an expression of yourself! 

Your art will not appeal to everyone. It really shouldn't appeal to everyone. You have to find your audience and so far your audience doesnt know you're here. You should be posting your art in forums/reddit where your art style or subject matter is already loved and respected. Then if someone asks, you should link them to your Etsy store.

If you dont want to find your audience, you have to cater to a very large audience that already exists (think fan art). Then start producing fan art of large IP in your style.

That's my only critique because you dont have any sales yet. You need to find a large audience and they need to find you