I would swap out the ceiling light with a more interesting semi flush light or ceiling fan. How about an accent wall?

I would get a rug.

Some option

How to make a bed https://www.youtube.com/watch?v=bvX7qZg6xqI

agree that the room is missing something... needs some more personality... saw this pic in your idea book, is this the look you like, you have a very blank slate. i would start with bedding and then add a rug, chandelier and some larger art... in the below pic the bed has a fluffy duvet and some color in pillows shams, all very fluffy inserts, not flat looking... simple but brings some more personality