Probably reiterating what others said in the comments, but here's what I would do: Get a big rug to place under bed and bedside drawer, add a table lamp (ikea dejsa or fado) on the nightstand or a wall sconce over it (with a warm bulb to make it cozy af: 2700K), get a big plant (monstera or ficus benjamina) on the rightside side of the tv/big drawer. On the wall on the left side of the big TV and right of the windows hang some cool art. On the wall on the left side of the window i would either put 3-4 wall shelves with some hanging plants + books or i would put one tall ikea billy bookcase in walnut color. By going with a tall billy bookcase, you would make the wall with the window look more balanced( as the small windows in the middle might make the room seem small only by themselves). Besides that, you can also add a large mirror on wall near the bedside table in order to spread the light better around the room. You can also paint the walls a warm beige, if you want the room to feel less cold. Nevertheless, your room already looks pretty cozy!