The way I've always boosted the confidence of skittish hams is really just by hanging out by their cages. I'll put my hand in and lie it flat for several minutes, this allows them to explore your scent and get used to human arms and hands hanging out in their cages. Just keep doing this nightly until she becomes used to you messing around in her cage. Remember too though that some hams just are skittish and there's nothing you can do about it. Good luck with taming