It's not entirely you. I have yet to make a sale myself so I am not the best person to give advice. However I do have some incite that may be helpful. I opened my shop at the end of April selling digital prints and have since added actual prints as well. When I first opened I got lots of views and favorites. My products were being seen. However since Etsy updated the seller tools and changed the website my views went to zero overnight and I am not joking, it happened overnight. Sometime in mid-May.
There is a whole thread of comments on it, link here
https://www.etsy.com/teams/7722/discussions/discuss/18282817/page/39 Sellers who regularly got 10 sells a day are only getting 1 a week if they are lucky. There is even a petition going around that will be sent to the new owner of etsy. That being said even established Esty shop owners are suffering.
As far as your shop goes the listings, seo, photo's, and titles all look great. The only thing I recommend changing is your prices. Ironically people don't buy things that are priced too cheap. Also at $1.70 you wont really make any money. Etsy fees add up. Here is a link that explains the different fees which I still find confusing myself,
(
http://esalesolutions.com/learning-center/reducing-etsy-fees.html?src=learningcenter ) Once you subtract $0.20 listing fee, 3% transaction fee, (other potential fees depending on the transaction 3.5% and $0.25) you don't have much left. Due to all of the fees I don't recommend going below $2.95 for any item in your shop. Once again I am no expert and have no sales to prove it but I hope my unprofessional opinions are helpful.
Personally I have bought a very expensive professional printer to make and sell prints of my artwork (thanks to Etsy messing around with the site I have yet to earn a cent with it :( However if by August Etsy hasn't gotten things straightened out I am going to build my own website since I have to do all of the promoting myself anyway. Also just so you know I have tried Etsy Promoted Listings at $5.00 a day and since the changes etsy has not been promoting my listing near as much as they were before the changes so it's basically useless.
I suggest to stick around until the fall, sells are supposedly slower in the summer anyway. See if things pick up and try to market through the dreaded social media (don't forget to add links to your Etsy Shop and Products that you are promoting.
PS your Instagram has way more followers than mine so your already doing better than me. Good luck and I hope you start getting sells soon. :) P.P.S If none of this is helpful simply ignore and have a great day, signed your broke overly-caffeinated Etsy friend.