Hi Jason, and welcome to the message board.
I've got quite a lot of chipmunks, and I've found they vary in personality a great deal. A few, when you put your hand in their aviary will jump straight on you from a very early age, but most will be quite shy, and probably run for cover. I've found that even the very shy ones can be tamed given time, anything up to a year to get them really tame. Always talk to her in a soothing voice, never make quick movements. Allow them to get used to your voice and the smell of your hand. Let them sniff your hand first. They are intelligent, and will learn their name quickly, but like cats, may chose not to come to you if it doesn't suit them. I would keep a new chipmunk in it's aviary for at least a month, so it gets to know that this is home, and a place of safety. This also makes it much easier to get your chipmunk back home after you have let her out for a run. This is assuming you're keeping yours indoors. I was really tempted with my first chipmunk to let him out to run around. You can use food to tame them, they have their favorites, mine like cherries, and monkey nuts. Monkey nuts are just peanuts in their shells, which you can get from most supermarkets. Avoid the roasted ones, just get the natural ones. They will start by just taking food from your hand, then you can gradually encourage them to come on to your hand. Always wash your hands first, not using strong smelling soap. Chipmunks are very smell sensitive, which is why I let them sniff my hand first if they want to, just so they can confirm it's me. You have to be really patient when taming them, some of mine have taken months to get used to climbing on me, these were the ones which once would run and hide even if I just came in to the room. Never try to rush the taming, if they are on you and want to get off, let them. Don't try to pick them up, especially from above if you can avoid it. The reason for not picking them up from above is because their wild prey (birds) will swoop down on them, so they hate this. It's always better to let them set the pace, and let them come on to you if they want. Unless your aviary is so big you can get in it, they real taming really only starts when your chipmunk is out in the same room as you. As I mentioned earlier there are some exceptions, you sometimes get a chipmunk that will use you as a climbing frame right from the word go. I've had success using cardboard tubes, about a meter long, and the sort that posters come in, for taming them. If they are out of their aviary and won't go home, you can put a tube down, which they almost can't resist looking in, then use this to put them back in their home. Most of mine like to run in one end of a tube for it to be moved somewhere else in the room, so they come out the other end somewhere different. You will probably get board with this before they do. I got most of my cardboard tubes from outside print shops, they seem to throw a lot out.
Supachipmunk mix is a really good food to start with, it is said to have everything thing they need. Plus daily fresh water of course. They do like all sorts of fresh fruit, but they don't eat very much of it. To begin with you'll have to try nearly all the types of fruit to find out what yours like. All mine like pomegranates, raw supersweet sweetcorn, shelled almonds, grapes cut in half and butersquashs cut in half (with the seeds left in). I personally don't think you can over feed them, as mine will leave most of the fresh stuff I put out. They only store dry stuff like nuts and seeds in their nests and around their aviary.
