She's just new to it. She's nervous. I was the exact same way. There isn't anything you can do but give her time and make her as comfortable as possible. If she want's to do things in the dark with you under the covers, then do that. Eventually she'll come out of her shell and become more confident and be able to tell you what she likes and what she wants.
Just let her know what you'll do what she needs to make her comfortable. Don't pressure her. Be easy with her.
There's nothing wrong with her at all, she just needs some time thats all
