I can try but nobody's available to help me at the moment and I'm afraid that I'll accidentally injure her further while cutting the feathers.
If you trim slowly, I think you’ll be okay. You can hold her head still by having her beak between your pointer and middle fingers, upwards from the neck. Hold gently, but firm enough that she doesn’t jerk out of your grasp. I’m going AFK for an hour or so, but I think she’ll be okay. Try to stay calm.