Poor Thumbkin, Poor Pinky

Both my li'l pinky and my thumbkin hurt :( Just started my first piano lesson today. Mom thought it would be easy for me since I could type so well....NOT!!! My first song to practice with was just a tinnie winnie part of Ode to Joy and I am already getting cramps.....geez.....how will my fingers be able to last another 9 lessons?? :P