You can go as simple or complicated as you like. I chose the latter several years ago.
Mounted a plastic track that bends and follows the roof curve, running from just above
the coat hooks all the way across. Comes in sections and includes end caps. Back then
it was called marine rod. It comes with nylon sliders and a heavy cloth tape with
attached snaps. Sew the tape to the curtains of your choice, shaping them at the sides
for the roof curve. The attached snaps snap into the holes in the nylon sliders.
For stealth lighting, I use two Eveready folding LED lights which fit neatly into the
tray above the galley. I can see what I am doing, but they aren't too visible from
outside. Casts a cool pale blue light and batteries last a long time.
Jerry