Wait until 7 days is up or he sheds, whichever comes later. Try and feed him in his tank at first til he get's settled in for a little while. He should stop being so defensive once he's gets comfortable. When you start handling him in a week or 2 try for only 15min at a time a few times a week. No handling for 48 hours after feeding. Don't make any fast movements to scare him and he should calm right down. I've had mine for almost 2 months now and he is fairly calm, not aggressive, just a bit fearful at first and headshy, which they mostly seem to retain fromw hat I've read.