My first instinct is that adding curtains could be really nice! If you’re open, a patterned fabric would balance out the big solid grey of the bedding really nicely. I would go for a grey pattern with maybe white or black mixed in!
I see that you have a full length mirror — try hanging it on the wall to give the room a lift. I also really like how you hung some art over the highboy. Keep with that and hang something on the wall over the desk. It could be one art piece or a series of five clustered frames could be cool (check out some gallery wall ideas here!)
You clearly already have good taste, so you go crazy!!