You can apply for the Discover it® for Students credit card. But to get approved for it, you will need to provide proof of income and you should be a student so you should wait to apply for this card until the fall when you are enrolled in college. Once you have the card, you can get a cash advance through an ATM. To do this you will need a 4 digit PIN. Note that cash advances include high interest rates and you will also be charged a cash advance fee.