I'm wanting to buy a car but I have no credit and no on to co-sign. Help?!?

I went to a place that I got approved for a loan at but they are wanting 26-28% just in interest!!! Just because I'm a first time buyer with no credit and no co-signer. That really does scare me. :| Is there anything I can do or anywhere that might help me out to where I can get better APR? I am willing to wait. I make about 25,000/yr with 4 1/2 months on the job (but I've already got a promotion.) Any suggestions?