Ok, that sounds great so far. Rather than the big box he's in, a bowl or small box with hay hollowed into a small nest shape and lined with tissue would be better. It'll keep him warmer and make him feel safe. Also a tiny teddy will help him feel safe too. They like to feel quite squished in thier nest because thats what they are used to. Keep it inside the big box though.
He should imprint on you and start to ask for food when he hears you coming, try making a consistent noise so he recognises it (it doesn't really matter what)
Also dip the catfood in water to make sure he gets enough moisture. As he gets a bit bigger, maggots from a bait shop are brilliant food too. They are wiggly and make him want to take them from you, but not yet as they might eat their way out of him :shock
unless you chop off their heads)
Keep them in the fridge though or they'll pupate!!
- also, you should know when he's full because you'll see his crop fill up. It's the little sac on the side of his neck, you can see through it sometimes :shock:
He should naturally go to sleep at about 10pm, and wake up about 5/6am - but so long as he's covered up he should just stay quiet.
Sorry to deluge you with info, its just to give you the best chance
Is your mum ok with him?