If you decide you aren’t going to have the desk against a wall, put a floor outlet in now so that you don’t have cables running across the floor. I did a floor plan with my desk and rug then figured out where I would need sockets.

Try the art pieces with top one at the top of the window and then the other about 1.5"" below the first. Your other art looks low to me. They should be hung so the middle of the art is about eye level to you or at a height that is compatible with the art between the windows.

The desk is cool. But the color is off from the pictures I can see. You can call a local and see if they can install it. And sand and restain to match. Or maybe you can paint over the walls ? 🤭😬

Can you post a photo of the room? Do you want a dark or light background for the wallpaper? Are you considering the leaf wallpaper in the last photo? If you are looking for a dark background, I have this peel and stick wallpaper on an accent wall in my bedroom. I think it would go nicely with the items you have selected. I also have a very similar rug in the room with the wallpaper as well. Peel and Stick Wallpaper Modern Black Geometric Wallpaper 17.71 in X 511 in Self-Adhesive Removable Wallpaper Matte Wallpaper Easy to Line Up for Home Christmas Decoration and Furniture Renovation https://a.co/d/5DcPhoy