I don't handle babies until 72 hours after feeding. You're _probably_ okay after 48. My reasoning is if I were to cause a regurge by handling too soon, a tiny snake is less able to handle the stress of a regurge than a big adult. I feel okay handling adults after 48 hours, unless I can still feel remnants of the meal.
With a brand new baby, I'd wait until after the second meal for handling. But yours ate easily, so you'd probably be okay to handle him for five minutes or so the day before his next meal. Then he gets a whole day to relax before you feed him.
After the second meal, you can handle him a couple times a day (not on the digestion days) but keep it short. You'll notice baby snakes, even if not scared out of their wits by you, are still apprehensive and will breathe very rapidly. You can _tell_ that they are stressed before you even pick them up- by the breathing rate. So short, pleasant handling sessions followed by the "reward" of going home to the viv should teach the baby that you aren't going to harm him and that he always gets to go back home when you are done. As he gets bigger and stronger and less fearful, then you can start doing more fun things like little photo shoots, having him watch a half hour TV show with you, etc.