I'm new to milksnakes as well, I love them. You might have 50 years of experience keeping snakes but you might be a Boa or a Corn Snake guy.
So I just want to be sure that you are not caught by surprise and that you don't feel any frustration as a new Milksnake owner. You fully understand how fight or flight they are when they are young...right?
I have 2.3 in my new start up collection,I also keep them in shoebox rack. They all freak out, they all musk me and two of them like to bite me. So do not feel discouraged about that behavior and just watch your feedings and temps and according to the people with alot more experience with Milks than I do the majority calm down after they get some age and size and make excellent captives colubrids
Good Luck