Make sure its well fed with meat. Let it run about where you can keep an eye onnit.
Get some ferretone or some malte paste, put it on your hand. If he goes to bite say no, offer again
and repeat if he bites(use fist if your nervous as he wont be able to get hold). Also stroke him while hes having the tone/paste, he will soon associate hands with good things.
I would leave him another day or so, hes still settling in everything is new to him.