So first of all I'll just give all the general information about my new ball python:

Name: Aki
Length: 4ft (guesstimate)
Age: About 2-3yrs
Tank size: 30" X 12" X 12" (I plan on getting a way bigger one when I save up the money)
Temperatures: Cool side 25°C, Basking side 32°C
Humidity: 55%
In tank: log hide, log, rocks, fake plants, water bowl, ect.

So my friend owned a ball python but couldn't take care of him anymore so I offered to take him of her hands. I love reptiles and have been taking care of a Bearded Dragon for 3 years now so I thought it'd be fine.

So I set his tank up in a corner of my living room and left him alone for a week except to mist whenever he needed it. Today I went out and bought two live feeder mice and when I got home and tried to take him out he simply bit me. It scared me more than anything else because whenever I went to my friend's house he was so chill and would let anybody handle him.

Did I decide to take him out to soon? How long should I leave him there before I try to take him out again to feed? This is my first time owning a snake so I am inexperienced. Any suggestions would be fantastic.