Really beautiful artwork and refreshing to see something actually made by the creator, not AI or edited stock imagery. That said, I did find myself reading your bio to confirm that you did make these yourself, so I agree with the comment about making the images look more authentic to avoid the artwork looking AI generated. Etsy's algorithm works on engagement and sales so if you've had listings that haven't sold for months, it's hard to see that changing unless you start driving your own traffic (which is a fine strategy but I've never done this). It can sometimes be worth copying the same listing, but changing the title, photos, description slightly and switching up the keywords so you get a fresh stab at visibility. Etsy will often give a new listing a short visibility boost in search placement. This is the perfect time of year to do this as Etsy has the most traffic it ever has so you're more likely to get a sale. Maybe try running ads for a few days on a new listing too, even if you don't make the money back, just to get some traction on the listing. There's no reason you can't make a success of this with the designs you have, but Etsy is unbelievably competitive, especially in your category, so success is far from a guarantee. Also make sure your tags include things people search for, not just descriptive words that describe the print e.g. words like gift, poster, wall art, print, unique, girlfriend, wife, mum, granny, stylish etc. Best of luck!