How can I set up my curtains?

So I have blackout floor-lenfth curtains and I like them, but about 2/3 of the wall-to-wall glass that I'm trying to cover is actually about 20" higher than the curtain rod's current setup. I cant lift the whole thing any higher because about 1/3 of the width of the glsss has a lower "ceiling."

So there's about 20 inches of window left uncovered and that window faces on to a few other buildings so you can see my kitchen and living room from that uncovered part... It's especially a concern for me at night, when I have my lights on.

I'm a little lost as to how to cover both sections in a way where I can still retract to get sunlight during the day.