Perhaps add the blinds just above lower window, which will better connect the two windows. Drapery panel choices: 1. below upper window 2. below arch 3. near ceiling

It is a lovely window. A real statement! Treat it as such!

I'd hang a rod just under the ceiling, extending beyond the window trim on each side.

a subtle textured panel with a large size rod.

Rods are available in so many great options, Polished, Dark, Pewter, whatever your style.

if the natural light on the middle window isn't an issue, I'd leave it uncovered.

On the lower window I would install x4 Inset bamboo blinds top down/bottom up Blinds.com

(come in a variety of colors from white to all sorts of natural tones)

You're not showing us the rest of the room, but your furnishing layout needs adjustment. Center the sofa on the large window. If you have a window that commands that much attention the sofa or the chairs needs to be centered on the window.

Yes, run the drapery panels to just under the arch window. Elminate the sheers that block your view. Motorize your drapery track.

Get your furniture properly placed on your area rug. The front feet of the seat should at least be placed on the rug. See the example below.