I would recommend to let her settle in a bit before interaction..
Let her settle in for a week (maybe more depending on the bird) before starting any hand interactions with her,
Sit next to her (not too close!) and read, talk about your day, or just have a chat with her in a soothing voice till she gets used to it.
After she’s used to you being around just offer her a millet spray,
I think the longer the better and hold the millet at the tip and try to get as far as possible from the cage but close enough to have some of the millet spray in her cage (between the bars)
Once she’s confident enough to eat a bit of it, make you hand climb a bit closer,
Becomes comfortable with your hand being a bit closer
Then make it a bit more closer until she’s eating from between your fingers
You cab then try targeting
Moving at the birds pace and patience is key to taming a bird
My cockatiel was very aggressive and cage bound that it took me well over 3 years of training before she was ok (most the time) to let me touch things in her cage without her coming to charge at me or have her step up while she’s in her cage
Body language is very important so keep an eye out and study her body language before moving to another step
Great read:
Pet bird and parrot behavior information.
lafeber.com
Some threads that might help!
Parrots rarely bite each other, because they convey their feelings beforehand or fly off to avoid physical contact. If it feels cornered and frighten then need to bite will be from the natural instinct of self -preservation. The cage is the Parrot safe haven and any attempt to enter, add or...
www.parrotforums.com