Colubrids are nippy at first. If you just got it then you can let it get used to its habitat for like 2 weeks and try handling again. But most likely it will still nip you. Colubrids tend to be really fast and nippy while young but should grow out of it. They also require a lot of attention so just take it out and keep it moving for a while until it gets its energy out and then try to calmly handle it so its not bouncing off the walls. Good luck.