Add a picture of the actual room. I would not layer rugs.

Thank you. Here’s a photo:

Hi, you have a beautiful home. Layering rugs isn't for everyone but I think in some cases it can look really nice, you have neutral tones in your space so I think that finding the fitting rugs won't be an issue. I would do a simple on one the bottom also neutral, a beige tone and a bit heavier when it comes to texture. The one above you can play with, I will post some photos of examples that I personally think look nice.

Thank you! Is it ok to have the first (bottom) area rug placed off center length-wise in the room (it will be centered width-wise) so that the area rug extends closer to the entry of the room, or is it a bad idea to have it off center? Looking for ways to minimize the appearance of floor irregularities the run the width of the floor about 3’ in on both ends.

It's ok because the rug, sofa are centered on the fireplace. Just make sure there is clearance for French doors to swing into the room. Leaving the table and chairs positioned as is, is perfect. Looks beautiful, Holly. My kind of room.

I found an option for a slightly larger rug: 13’ wide x 20’ long, as compared to 12’ wide x 18’ long. I’ll attach a mock up with the larger rug.

The differences in exposed wood floor around the rug would be:
12x18: 2.5’ of floor would show on the sides, and 3.75’ would be exposed on the ends

13x20: 2’ of floor would show on the sides, and 2.5’ would be exposed on the ends

What would look better?? The 13x20 provides length to center the rug and cover floor irregularities that I don’t love, but is a lot of rug. The 12x18 leaves things I don’t love exposed but also leaves us with more wood floor. I think I’m concerned that 13x20 might cover too much floor. Any thoughts based on experience would be much appreciated!!