Honestly my best advice is not to handle the baby until it starts feeding.... The striking at you could be several things, fear, stress, hunger.......

I know it is difficult but as a general rule, any new acquisitions to my collection get handled from the container or box they came in, just long enough to snap a few pics, and put in a quarantine set up and left undisturbed until they they have fed twice for me.... Now being that the breeder was irresponsible enough to send you a fresh hatchie, I would stretch this time out to 3-4 feedings let them get settled in, and come to the understanding that when you show up good things happen, you give them food, water, clean up after em ect (I doubt they actually understand all of this, but they do begin to understand you mean no harm at lest usually). In time the little bugger will calm down.