She hasn't been with you for very long, so don't panic just yet! I got a new girl a few days ago and she is still skittish of being picked up/held, but is comfortable in her cage and with the other rats. Give her treats that she would have to lick off of you, like baby food or yogurt, so she can't take the treat and run away to eat it. Also try the immersion idea, there is a thread on this website about it. Keep her with you in a tight space so that she's forced to acknowledge and interact with you. Talk to her softly and let her know you aren't a threat. It takes more time with some rats than others, but don't lose hope! She will learn soon. Moving away from where ever you got her and into a new environment is very scary and can be stressful. If you get her a friend of the same sex she would be much more comfortable and you would have double the fun
