I dont know if I would be trying to pick it up after only feeding it once. I understand the urge, but I typically wait for 3 feedings (about 4 weeks) before handling.
As for getting him out: pull the top off and just grab him. Then pick him up and hold him still for a few moments so he can relax. I do it all the time and it saves you from being hissed at or having a snake that is spazing out.