Well the no hide box is a terrible idea if you want it to be calm. You should give it plenty of hiding spots and dont think of handling for a couple months at least. I know it will be hard but it will be worth it in the end. You need him to feel as safe as possible and then when he has the confidence to start comming out on his own, you can gradually begin the 'taming' process.
As for feeding, most of that is total crap. Greens?! No chance. I would also stay away from eggs, the cooked meat, and deffinetly the feeder fish. You need to give him whole meals, such as insects (crickets, wax worms, silks, mealworms, butter worms, hornworms, etc.) Insects make up a monitors diet in the wild almost exclusively. You can give him mice/rats, preferably ones with no hair, max once a week. Another good choice would be a seafood mix. That can be given once or twice a week. Then insects the other days, and mice/rats whenever. Feed him every other day. Everyday wouldnt be to good, unless hes severly underweight, as he can become obese easily. Crickets are good to help them get some excercize.
As for the enclosure, do not use a screen top aquarium. Keep it for fish. Build your own cage, something like 6x2x2 for a permenent home. You dont need that right away but its the minimum when hes full grown. As well, the higher the better, so you can raise the basking spot and help him get more excercize. The basking spot should be 120 F and no where in the tank should it be less then 75 even 80
imo.
Thats a terrible story, I cant believe people actually fight dogs together..so odd. Anyways good luck with him and ask as many questions as you can, to better help this monitor. And I have to say good on you for taking it and trying to give it a good home
Didnt catch that last post, but no need to do that. They're smart enough to be able to smell your human scent and realise it is not food. My guy understands this, but its up to you to enforce it.