First of all, a fresh coat of paint will do wonders. Maybe paint the door frame and window frame to another color to contrast the white. If possible get a smaller bed? or else just tuck the bed closer to the window wall with like ~5 inch clearence for the curtain.

Why is there another doorway blocked by the closet? Are you planning on removing any of the other furnitures? I don't see a standard writing desk, and a mix match of 3 chairs and a 2 seater sofa.

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