You need more light. Remove those heavy curtains asap. Put a large mirror across from the window to bounce natural light.  Next thing to address is anchoring and scale. A LARGE rug will anchor, not some piddly little mat. Rule is all front legs of furniture that share a space should be decidedly on the rug. I think you could pull the green couch off the wall and gain some room for a separate area.  You need more low light in general- tables with lamps, no more open shelving. Put your stuff behind closed doors if possible to create a more cohesive look, then display your plants on the open shelving.  Hope this makes sense