A long, low, console under the TV between the windows is a good idea. Don't put shelves or mirrors or anything else on that wall. You need to account for the drapes which will hang on both sides on the windows. I would use white or cream maybe with some texture. As an alternative, you could use roman shades instead. For the rug, look for something with some pattern that also has a bit of the red color. A darker rug would ground the space and be more baby friendly. A round gold/marble or gold/wood table would work well. You don't have room for a sofa table behind the sofa without encroaching on the walkway, so leave that clear. Put a large piece of art on the wall behind the sofa instead. Get an end table and table lamp for the space between the sofa and chair. You may be able to fit a low bench under the window perpendicular to the door, which would give you more seating and a place to stash your shoes under it.
Q