May a truly newbie beginner say something here?
I am learning to play the piano, my lesson started sept. of 2007 and the very first key I learned was the key of C. It was very simple no flats and no sharps it was easy for me to learn the half and whole steps. The melodic & harmonic intervals, the major, minor and tetra chords were easy. Learning the correct fingering was easy. The key of A minor was easy to learn. I learned most of theory that I know in the key of C first than moved to the key of G with one # next the key of F with one b. it was easy for me to learn in this order now I am learning the other keys by adding one # or b to the previous key. In addition, as I learn a new key I learn each relative minor key. Therefore, my experience has been that the key of C was the easiest to start with and continue to add on to the other keys . Now that is my .02 worth.