This graphic has pretty good information. The general advice is to hang them high, wide and full. I personally don't care for the rod jammed right up against the ceiling but some people like the look.

Remember that unless you are using custom you'll have to work with stock curtain lengths which will dictate how high you can hang the panels.

my post didnt update before, any advice on working around this ledge?

Can you post a pic from farther back? What is the white trim under the ledge?

Do you need light control or will the curtains just be decorative? You can get a rod with extra-long brackets so the curtains clear the ledge but you will get light leakage from the sides. You could add a decorative inside mount blind if you need light control.

https://jenniferrizzo.com/2016/01/decorating-ideas-for-a-basement-family-room.html

just decorative, that sounds like a plan, thanks so much