Some photos or a sketch with dimensions would help!

I've been trying to upload, it keeps getting stuck. :(

Yay it worked!!

Please add a picture from the windows into the room.

First thoughts: Place the sofa with the back to the windows. Place to chairs facing the windows. Do you use the bar area?

No, we do not use the bar area. Here's looking towards the front door.

Please supply a detailed floor plan of the room, including measurements.

What is that hole under the stair?

It a mini hallway? To the dining room

I am slowly made progress with putting the arts on the walls. Question on the very top of the fireplace, there's ledge there to put decors in. Should I leave it bare or put something there?

Also, the mantel- paint or stain a different color?

See if you are able to stain it a darker, non-red color, like your flooring.