I’m doing builtins with no upper shelves (personal preference) and need help with lighting ideas and if I should do large art on each side or if I could do subtle wallpaper (no art) for accent walls or if it would be too busy?

tv is staying where it is - all of the hodge podge furniture shown is not staying.

the first pic is a tray I got and am using it as inspiration for the builtins - warm, stained wood with black, metal pulls - left side will be a dry bar and counter top will be stained wood - I want to warm up our already light floors and light stone fireplace.

2nd pic - space as is

3rd pic - my iPhone picture edit attempt to show what I’m looking to do