They are right about the feeding. Once the initial week is up (without handling) you should feed and leave the snake alone for 48 hours. After that, remove the hide and slowly show him your hand so that he knows you're there. The at the lowest possible angle approach him with your hand and kinda scoop him up. If you can't use your fingers to lift his body and scoop him up. Make sure you approach from behind his head so that he's not directly staring at your hand when you're picking him up. If he hisses, don't worry just try to pick him up. He will calm down once in your hand.

One sign of possible nippage(lol) is when you try to pick him up he raises the part of the body where you touched him quickly and hisses. This was a sign for me to actually leave him alone for the time being. The next thing my BP usually did after this is turn his head towards my fingers and snap into the S(striking) position. But if he didn't raise his body and hissed, that was just his whiny way of saying "pfft leave me alone." (This is just what my snake did and I thought it might help you. BTW after 2 weeks or so he stopped doing that and hissing all together)