snakes poke around, it's inevitable...
A lot of times my snake goes crazy I worry if there is something wrong.
The advice given already is very good. But try not to worry too much.
Any animal brought home in a car ride, or shipped via mail, is going to be very stressed out already.
I'll add one piece of practical advice that worked wonderfully for me when my snake was younger. On the fourth side that is open, cover the bottom five inches with some opaque material. It might diminish your view, but thats probably exactly what your snake wants.
If you do make any changes, try doing them at once and letting the snake resettle to that. Don't stagger the changes because it will stress out the snake all over again each time