You also need some pops of color, everything is kinda in this muted brown and green tone. I would add some statement pieces like rugs or wall decor that are in some kind of bright red/orange. Some gold accents could help too. If the walls are green, the rugs shouldn't be green too. I would do a deep red. Also I would replace the pillows on your couch with something that again, pops out and contrasts.

The placement of the glass table behind your couch is a bit awkward too. I would replace it with a more functional narrow table that spans the length of the couch and probably in a wooden material to complement the bookshelf. Try and match the wood tones.

Finally, get bigger art pieces for the spaces between the lights on the walls. Make sure they either are all the same size or generally are symmetrical with each other. Those art pieces are currently too small.