Hey, you are a step ahead of me, I've been bit, but I mostly try to avoid being bit. I do move my hand away, then go right back and try petting or touching her again, I don't stop until I've had a chance to touch her without letting her bite me. It's probably not the right thing to do, but I just never know if she will bite real hard or not, she has drawn blood before.
Just hang in there, It takes time. I know it's hard, I want my girls to love & trust my husband and I so badly. We can't give up on them, it'll happen at least to some degree sooner or later. And just think of how exciting it will be when the breakthrough comes.
Try handling through fleece, if you have a pouch you can try using like glove, I've done this, but mostly i'll just gently rub them when they're in their sleep pouch while holding it.
Wish you best of luck.