Oooo, she is LOVELY!
Ms Friskers was exactly the same way when she first came in -- she would let me pet her, but everyone else got bitten, and did NOT tolerate being held or restrained in any way.
After about a month, she had accepted my roommate as another source of petting, and would let me hold her for VERY short periods of time (less than a minute, and then she'd struggle to get down).
Then I mid-catted her labor for her, and she turned into a little love ball around me, and would let me hold her for longer periods of time, pick her up and put her in my lap for petting, and restrain her without biting me (she/the kittens had a cold, so she was getting antibiotic doses right after the kittens were born). She also started tolerating new people and even responded pleasantly to my partner when he visited for the weekend.
Now, other than the once in awhile chomp (no longer breaks the skin), she's pretty much what I'd call a normal cat. I can pick her up and carry her around, I can stuff her in the cat carrier, and she'll tolerate my restraining her without harming me (there's cat introductions going on, so there's been a bit of the restraining...)
So, given where I started, which is about where you started, just take it easy, pet her as much as she likes, and in three months, she'll probably be just slightly on the neurotic side of normal.