Typically an older chinchilla, older than 3-4 months, that has not been handled, will never get very tame. It doesn't mean they won't make a great pet, it is just you will have to care for them a bit differently. There are ways of conditioning your chinchilla to be held. It is a process that will take months, but just slowly get your chinchilla used to different things, starting with a scratch on chin and progressing towards the back little by little. Then you should be be able to handle her front feet and eventually get her to step onto your hand. You have to go in small steps or you will get bit so your aim should be to go as far as you can without getting bit or causing your pet to panic.
However I do recommend waiting another week or two before trying to anything with her, let her get settled in, and go from there. You won't be able to work much with an animal that does not trust you. Each time you get bit and have to pull away this will reinforce the behavior. But if you do anything at this point to correct it you may end up making your pet scared of you. When the time comes you'll need to pull your chin out of the cage and hold her for a second or two and then put her back in the cage but I don't think she's quite ready for that yet.
