Hi, Sameen, congratulations on launching your new shop!!
I agree that your photos are dark and difficult to see. IMO your first photo should be without a frame to enlarge the image. Other photos can include frames, photos on the wall, on a little table, etc.
I think your warning on your listings regarding copyright anticipates the buyers' misuse of your files:
The artwork in this shop is totally the authority of mine.You don't have right to copy my designs. So,you have been warned.If you steal it ,copy it, you will be sued for damages.
I would delete "So,you have been warned.If you steal it ,copy it, you will be sued for damages."
IMO put the entire note in your policies.
Good luck!