Congrats on your new Ball,

Normally it takes about a week or so for them to get settled in. You did just what was necessary by not bothering him for a week, he's probably a bit settled in. Since he's still new he's gonna be shy for a while until he gets used to handling and the new feeding schedule.

By the way, a hiding Ball python is a happy Ball python. They tend to hide during the day time and come out at night to cruise around, so don't be alarmed if he doesn't go roaming around during the day time. This is why they are also considered not a very good snake for display.

New Balls tend to picky eaters, so don't worry too much about it. Balls can go a while without eating and no change in their weight so you don't have to worry now about refusals. If he's been refusing for a couple months, then that's probably the time to get a little concerned.

What are your temps, humidity, cage size, and hides like? What are you using for a heat source? Answer those first then we can be able to help you a little bit further.

Sometimes when you get a new snake they may be accustomed to their previous feeding, so if it was fed live it most likely could still be used to eating live rodents. Try feeding again in a few days and see if he takes F/T. If he doesn't, I would try a pre killed or live rat about the same size as the middle part of the snake's body.

One last thing, try handling the snake after you get it started eating; handling could stress it out and cause it to keep refusing. But keep in mind to only handle it a couple days after it eats. Snakes are slow at digesting so it takes a couple days to fully digest. If they are held right after they ate or within a day after eating they may regurgitate (or throw up) their meal.

Hope things go well for you and keep us updated on your new snake!