If you're going to handle daily, keep the sessions short and calm for now. Just 10 minutes max per session. It's not "the more the better" for handling snakes, because overhandling will stress them out even more.
Also, how much does she weigh? Young ball pythons under 300g or so will almost always be extra jumpy and defensive. If she hasn't struck at you, just being a bit jumpy, it is perfectly normal.
The other thing is making sure your husbandry is on point, you have tight hides, and that you're using digital thermometers (not the analog round kind). Incorrect husbandry also stresses an animal out and may make them defensive.