I would use 2 large soft l

I would use 2 large soft lights to shine just on the green screen. put one on the left and one on the right.

Then you should be standing no less than 6 feet away from the green screen. If you need a full body shot, then the floor needs to be green and evenly light as well.

Then implement 3-point lighting for yourself. A rim light should help separate you from the background.