You did a great job! And this comes from a person who has used photoshop for over ten years. This is a nice photo and I love what you've done so far.
I agree with the others to take out the flooring. Also, one little trick you can do to make it look more natural around the edges: zoom in close on the edges and blend a tiny bit with the blur tool, but use a low strength like 14% and a small/medium brush size. By blending just a little around the edges it will look less like the scenery was photoshopped in.