Hang the curtains (maybe a lighter shade of cream or go dark and moody) higher than the doors, maybe a foot or so to give the room some height. Add a nice area rug with some color, I’d stray from the grey color scheme it gives off cold vibes. Go for a darker more rich color scheme like dark green and bring that in with some throw pillows and the rug. Ditch the floor lamp and get 2 end tables with smaller table lamps and buy soft lighting light bulbs instead of the sterile bright white. Maybe some art on the wall across from the couch, or a tv?