I would suggest not handling him until your ready to feed him. If the breeder was feeding him in a different container then I bet he is used to being picked up. I know its hard to not handle them when its your first bp, but if you want the best for your snake thats what you gotta do. Wait till this thursday, at like 8 or 9 take him out place him in the other container and put the mouse in. Dont hover over him, but observe. He should take it within minutes. If he doesn't go for it in 15 minutes then I doubt he is going to eat it. But dont worry about that, there are plenty of ways to get picky eaters to go for it.