Here is a pretty quick video from Justin Kobylka on how to handle a nippy baby. Also don't be afraid of them, be confident when you handle them or it's going to be rough on you when he gets to 1000g's and you're afraid to pick him up. I have an Enchi female who hisses sometimes when I pick her up but I just distract her with one hand and grab her with the other and once picked up she's a chill as can be.

https://www.youtube.com/watch?v=S7DQssbM0uk