Do not worry about the lights. I am no expert either in photography or lighting, but I take shots with a smartphone, a battery torch, and sometimes candles yet the results are occasionally very satisfactory. Yes, candles! Your creation looks very suitable for using candle lights. Just try to put a few candles behind the high hills, so that they do not show up in the shot, but their lights do. (assuming you already set up the dark background) I am already excited about the possible results! :))