Lovely room, and you do not need black out curtains unless you make hubby sleep on the couch. I would do panels in a neutral color with a hint of the same red that is in the rug. If you feel exposed from the front, you can do sheers between the panels. You don’t need heavy drapes, but with a window of that width, we usually use drywall anchors which is no big deal.

I want to be able to close them completely every single day.

I like the look of blackout blinds, I like the way they hang compared to ones with minimal or no lining.

I did Hunter Douglas Vignettes with lined drapery panels on a similar window, The Vignettes are LiftRise but you can also get them remote. The drapery panels were custom made. Pinch Pleats on rings. I close the Vignette everyday, but the panels are stationary.

Can you not just close the blinds completely every day? Why does it have to be the curtains? Is it a light issue or a privacy issue?

Pianos are not supposed to be put on exterior walls.

If the draperies are expertly made they should hang properly without needed a heavy lining. The experts use weights in the bottom hem.

I suggest a light drapery the color of the wall if you want to dress that window.

I like shades or blinds with curtains. You could also use sheers under the curtains.

Curtain panels please but think about the visual weight you are considering. Your room is very airy and minimal. Don't weigh the room down with too heavy curtains. DH will figure out the hardware. You have plenty of room above the window frames.

If light and heat control is the issue for that window do solar dhades for that the bonus you get to keep the view and have daytime privacy then just nice linen drapes for night time privacy I see no reason for blackouts in this space .

https://www.architecturaldigest.com/story/nate-berkus-assembles-a-handsome-new-collection-for-the-shade-store

Nate Berkus is doing drapery at The Shade Store. You'll have more options than you'll get from PB.

Love what Beverly showed. Perfect and really adds to the room.

I’ve had curtains in a similar window set-up as yours, had no problem mounting the rods without studs.

I’d go with roman blinds and curtains on the sides if you want drapes.