That's not very much info. By looking at the cage, I would cover the sides to start with.
What are the temps on the cool side, warm side, and humidity?
What is the heat source? Are you using a t-stat?
Also ideally since the snake is a baby and new, you really should have 2 hides for him. One on the warm side and one on the cool side. As they get older and more comfortable, you can remove hides and eventually most when they get big don't even use hides like my boas but I still offer them to them as it does add floor space.
As for food, how long is the burm? A hopper might work if he is a very young baby. I start my baby boas on hoppers and upsize as needed. But more than likely, your snake will be able to eat a small adult mouse. My 11 month old boa eats adult mice every 7 days.
Without knowing all the info, there is no way anyone can answer your question. It might be too hot, too cold, too scared or sick.
Also why so much lighting? Don't need that big strip housing AND the dome. Just use one. Nothing wrong with lighting but you don't need to blast it full power in the cage lol.
And also, what was the breeder or whoever you got it from feeding it? How often? Live or F/T? Last time it ate? Most of the time a baby is going to be an eating machine as long as it's requirements are met.