You're doing a great job!
Be patient and don't give up on her. She is now in a new environment and needs to be allowed time to adjust to her new forever home. Just like with people, sometimes it takes a little more time to warm up to some than others. And that's okay

Continue to be gentle with her and make slow movements when approaching her. Use a calming voice when petting or stroking her. The idea is to build rapport and not force anything upon her.
Do you happen to know anything about her past history?
She may be somewhat fearful of men in general. This could be a result of ill treatment by a male in her previous living conditions, thus, now making that connection of "maltreatment" with
all men..
The best way to overcome that scarring is to provide her with an environment that she feels safe and secure in by doing what you've been doing.
Good luck.