We have quite a few burms (ranging from hatchlings to 18 feet).
They are lazy for the most part-until its time to eat then the feeding franzy begins-burms are garbage disposals-they will eat and eat.
As babies, burms tend to be nippy and hissy but with consistent handling they tend to calm down rather quickly. Make sure you have a reliable food source. Caging is also important-make sure the cage can hold temps and humidity and has secure locks.
RKO is 100% correct-hook train!!!!
The bet bit of advice I can give is never ever let your guard down.

Here are some pics of my husband with some of our larger burms-