2001 Plymouth Neon ignition

Hello. I drove my 2001 plymouth neon today and it started fantastic never has had a problem with it starting, but I walk out side probably 4 hours after driving it to go to the store and it wont even make a noise, lights work radio works dorrs lock, so it is not the battery. But it makes 2 little click noises coming from the key hole every time you turn it. The engine does nothing. Doesnt turn over absolutly nothing. Can you help me? Im too damn broke to take it somewhere and I would like to try to fix it myself. Thanks alot!

-Anthony