When it comes to properly lighting the screen itself, the goal is to get the lighting as even as possible. The fewer tones of green, the easier it’ll be to work with in post production.
I recommend lighting the green screen separately from your subject. Try lighting it from the left and right with two large lights. We’re using large panel lights from LEDGO.
You’ll want to place your subject in front of these lights. That way you don’t have to deal with any shadows on the green screen.