Allow him time to settle in, at least a week before you try and feed him again or handle him.
The constant feeding is likely stressing him and until you have a warmer spot than 80 you probably don't want him trying to digest anyways.
As for handling, be assertive with your movements, if you're going to pick him up, pick him up. No indecisive jumpiness as that will scare your snake.
Sit down with him in your lap and leave him be. Let him get comfortable and explore, after about 10 mins you can put him away and try again the next day.