Hey everyone!

So, I've had Pua for a few days now, I've only picked him up once since getting him, but it was brief,
i just put him in a separate container to rearrange his cage. But now that he's been in his new home for a couple of days, I think I'm ready to start taming/handling him. He's about 6 months old, I'm not sure how much his previous owners handled him, but his last owner said he was "nippy", but most BPs are like that when young. He's definitely took a few lunges at me while I was fixing his thermometer. I'm not sure whether that's normal or if he's just really mean. How would you guys recommend taking him? Again, he's 6 months old. What should I be looking for in terms of stress, calmness, etc.