Young colubrids can be nervous and nippy as babies but should grow out of it. He has been under alot of stress the last couple weeks so just give him time to chill with little to no handling. Make sure he has a good secure place to hide and feel secure. After a few weeks you can increase the frequency and duration of handling him.
And just reach in and pick him up with confidence, no need for gloves and if your tentative its when you usually get tagged. He may give a little strike but I will prob just bounce off.