To start out with, you can use the 'Auto White Balance' setting and experiment with cooler and warmer adjustments when you edit to see which effect you prefer.
If you're getting some light pollution from surrounding areas being picked up on the camera, adjusting the white balance can make it look like a feature of the photo (we recommend cooling it right down and seeing the effect that has), although you'd need a gradient filter to reduce noise if you're closer to an urban area. To start out with, you can use the 'Auto White Balance' setting and experiment with cooler and warmer adjustments when you edit to see which effect you prefer.