For starters please flip the arrangement because the TV should NOT be in front of the window.

BUMP

I"ll leave carpet design suggestions to some of the wonderful pros on here, but regarding cost effective ideas, here's one that worked for me. I purchased a carpet remnant very inexpensively and then took it to a local flooring/carpet store who bound it for me. The binding charge was by the linear foot and was very reasonable. Local carpet stores usually have an assortment of remnants that you can buy inexpensively although I found mine at Habitat ReUse. It was a new remnant donated by a carpet company. The hardest part of the effort was transporting the roll of carpet but hopefully you have access to a pickup or a friend with one. If you are looking for a solid color, Ollie's Bargain Outlet has an interesting inventory of carpets that are remnants (some bound, some not) from a manufacturer. Not sure if there's an Ollie's near you but you never know what they'll have.

This is a 6 x 9 rug with a two seater sofa. It allows the sofa, coffee table, accent chair (the dark one), to have front legs on the rug.

I chose this rug because it has all the tones of your furniture in it and one accent color, which you need to lighten up the space.

https://www.amazon.com/HOMFINER-Textured-Decorative-Chenille-Farmhouse/dp/B0F3F5DYZN/ref=sr_1_48?adgrpid=193321818944&dib=eyJ2IjoiMSJ9.BU2FYdkKN90Qzhvzu8jNMjd4cN38b49MjJMhOuUt3nuHRe6SVMh6Fb9T-TbRGBOOMzUJrqwD4f7E3odLT7GAWS9bDv9SzKC7RCs6ONuy8khR9zhH0VTYVD8rWynIQ8mdDJL4H4fnYiYWZK4jPofJzH6e2PulQ8ni5UjA3Ji_GFIqnTCFWHOhgLdq9KB9NK0hrLTJDegcAc77udVPAfzpe5aCTIyUXIfYGKmRn48NrH3g3TkPQzkJHMIH-H4yr8w8oaqEw45XSxvk9hSy6fqG2CeB1B4X__ThM9QXkWv3Z4U.dyCt1vFVSMu9rJGirBMC8tCiZvr31De3ecO8hC1N9Bk&dib_tag=se&hvadid=779561263182&hvdev=c&hvexpln=0&hvlocphy=9002156&hvnetw=g&hvocijid=6150908805758137046--&hvqmt=b&hvrand=6150908805758137046&hvtargid=kwd-755724608113&hydadcr=13071_13365428_2316664&keywords=blue%2Bgray%2Bbrown%2Bpillow&mcid=42e42b48619f38f88e848adce36e7889&qid=1776373047&sr=8-48&th=1

It is washable (sweet pup, matches sweet pup).

https://www.wayfair.com/rugs/pdp/17-stories-abstract-machine-made-power-loom-polypropylene-dovebark-indoor-area-rug-w005925801.html?piid=586147916

Definitely, go with @BeverlyFLADeziner suggestion. Add in that smokey blue in the rug for pillows and window treatments.

$19.00 a panel and are black outs.

https://www.homedepot.com/p/LiGHTSOUT-with-EnerShield-Technology-Fairfax-Blue-38-in-W-x-84-in-L-Grommet-100-Blackout-Curtain-Single-Panel-HDFAIRFAX-400-466/331257044?source=shoppingads&locale=en-US&fp=ggl

Yikes! You need to move. We tip a very generous amount (cash) to our bartender. No tip on the food bill, because he is serving us. We eat at the bar; we see regulars; we meet new folks. He makes our evenings out so much fun.