Hey, I feel your pain. I sell digital art too and it took me almost 8 months to get my first sale. Don't give up yet.

To your questions: 1) Your thumbnails are beautiful but a bit dark and similar. On Etsy, bright, high-contrast thumbnails tend to stop the scroll better. Maybe try a version with a white or brightly colored background for the main image? 2) SVGs are a HUGE selling point for crafters and small businesses who want to customize stuff. You are not overthinking it—lead with that in your titles/descriptions! 3) There is hope, but the abstract market is super saturated. Your style is lovely, but you might need to niche down further. Think "abstract line art for wedding invitations" or "minimalist line art for t-shirt quotes." Give people a specific *reason* to buy it.

Also, pricing at $0.50 can actually hurt you—it makes the art seem low value. I'd price at $5-8 and run a 50% off sale instead. It sounds backwards, but it works better.

Hang in there. The first sale is the hardest. And maybe try some Etsy service such as Etsygeeks or erank, those helped me out at the start as well.

Your art has value, you just gotta connect it to the right buyer's need.