Cant really answer the biting retic part as Caesar my retic has been a blessing since he was a 5 month old baby. Only time he has ever shown 'threatened' anything was a snake hook when i tried to tap train him lol. He really hated the hook. Otherwise i have always been able to reach in and pick him up and he is fine as long as he doesnt smell food. My other snakes are the same, even both my GTPs except at night with them lol.

My only experience with a bitey snake was with my JCP who i didnt get as a baby. I got her switched over to FT rats anytime with no problem but i never got her 'tamed'. I always ran a 50% chance of getting tagged whenever i reached into the cage, even across the cage. Not sure what the previous owner did but they did it wrong lol. She was from Nick Mutton at Inland Reptiles so i believe it was the previous owner.

My advice is just let the snake calm down and settle in. Generally a snake is going to be defensive if it scared or if it has had some kind of traumatic experience with humans. Just let her calm down and get used to your smell and the living area and once she realizes nothing is going to hurt her or try and eat her, she should mellow out and become more curious. Now with that said, some snakes are just high strung and will never mellow out. Pray yours isnt like that.