Definitely lowered lights. Maybe wallpaper on the walls. Even on the ceiling also would be cool. And yes to a rug.

Hi and thank you

I have a huge piece of Art on the other wall and thought it might be too much to put two ??

IMO never too much art and I love oversized pieces for real drama

The light fixtures are too small and too high. A large mirror on that wall would be dramatic and reflect light from the window. I think you need a rug to warm up the tile floor.

Low, modern black chandeliers and accessorize sideboard

Large art on back wall. a large plant and neutral rug. Drapes if suitable

thank you very much for all your help