I would put a rod across the top HIGH, just below the crown moulding and hang simple Grommet Drape Panels of your choice (I'd choose a color similar to the wall color).

at least x4 50" wide panels for fullness.

Open/stack to right side ... if you need white for the streetside, line them with white. (Then you can use any pattern you'd like)

Good idea… would you have them just skim the floor?

Yes, just to the floor, leave the blinds, if you like them, they add texture.

I'd use a rod halfway between the crown molding and the top of the window molding, with lined drapes on small rings. To me, grommet drapes look like shower curtains.

Equestrian Serene · More Info

Los Altos Living Room · More Info

Do not have the drapes touch the floor -- have them hover just above it.

Another option might be to add a tinted film to the upper windows -- sunglasses for windows and keep your blinds or use shades on the lower windows.