Your idea sounds lovely. I think the curtain rod is not wide enough to let the curtains open up all the way. I would pull the sofa out a foot or two to not crowd them and so you can see more of them. I found this article online:

https://www.twotwentyone.net/living-room-window-treatments/

We've also used Steve's Blinds and they are a great place to order.

https://www.stevesblindsandwallpaper.com/

Beauty is in the eye of the beholder...I don't like the art in your space...overpowering. Your room seems so peaceful to me.

I like the touch of pink in this piece, called Dusk Reflections, a lighter tone of the accent chair and the pale neutral as window treatment.

However, I am the first one to say art is subjective.

Thank you both. Love your ideas. Where did you find the art please.

I’m not very good at this so I appreciate the advice.