Thanks for your suggestions! Yes the fireplace is working and unfortunately I think the TV is too big to put on the fireplace (it sticks out at the end, is that okay?). As for the dining table, there is no real space behind the bar stools. That is the entrance to our home and it's just a narrow hallway. The other thing I'm worried about with putting the TV where it is now is that the space behind the couch feels under-utilized... I was thinking of getting this TV stand, is this too high up do you think?: [https://www.houzz.com/products/tv-stand-milano-200-black-body-modern-90-tv-stand-led-gray-black-prvw-vr~104115228[(https://www.houzz.com/products/tv-stand-milano-200-black-body-modern-90-tv-stand-led-gray-black-prvw-vr~104115228)

Make it attractive by adding accessories. Buy an area rug for under the dining table that has your wall color in the pallet. Then take the other colors and use them around the room. You can get inexpensive panels for the windows to warm up the room -- the dining area and the third window. Add the same two panels to the living room window. You might get something textured or a small print, using the colors from the rug. Move the dinning table so the middle of it is directly under the light. I would add one or two floor plants in the corner of the dining area. Lastly, you can find something with color to hang on the wall at TJ Max or Target. I think your furniture is fine for "staging" the house for sale.

you have a very lovely room. you may want to consider a Chesterfield style sofa in a grey. I would place the sofa across from the fireplace and then the two chairs looking out the window... not sure if you have enough room for two sofas. looks like you also need to place a kitchen table and chairs too. insay that because with the open area you have, it may start to look crowded. heres a grey chesterfield sofa with some ivory chairs to give you an idea of how it would look with your chairs.

Giavanna, I think your best best is to first settle on a look you're going for. Go through Houzz photos (do a search on Open concept living rooms) and create an ideabook of things you like. Do you like modern styles? Traditional styles? It looks like you have kids, so family friendly will likely be important. I think we need a bit more to go on before we can give you good advice.