Looks very nice! Small amount of detail and great use of color. Try giving the lamp a better color like a white or silver something like that could work however find one that matches with the scene.
I would try experimenting with wall objects more, in a few reference image the walls aren’t that plain try throwing a wall shelve to make it have a more unique design place objects around such as clocks, pictures, trophy, books or a potted plant on the desk try placing small items and see what suites your liking.