Congrats!

Hand feed her lots. Put an item of clothing (something you don't mind getting wrecked), like a sock, in her cage so she gets used to being around your scent. Handle her ALOT -- just carry her around on your shoulder for an hour a day. She should warm up in no time. Some rats take a while. My RB rat Icarus took about a month befoe he finally liked me, but he was also 3 months old when I got him. My babies stopped being afraid of me within about a week. They were 7 weeks old when I got them, so I think the younger the better. How old is your girl? Any name yet?