I used aluminum tape to cover my screen top all but where my light sits. Red light keeps my ambient temps about 80-82. You will need a hydrometer to keep track of humidity as a tank set up will dry out fast. I mist mine about every day to keep it around 60% and twice a day at least during shed.
You may also consider getting a background or black paper to cover the back and sides of your tank to help your snake feel more secure. He looks really good and healthy!!