Probably, It would be better on a keyboard though. I don't know where you could find sheets of the music, but if you know another musician that was self taught Im sure they could help you out.
First, you need a piano ... then you need to find the music, purchase it, takes piano lessons, learn and practice the piece for weeks and/or months, then finally play it.
When Maka and Soul first met, Soul played an insane tune on the piano, sort of as a way of impressing Maka. Later, Soul plays the piano inside his soul to amplify his power and his friends' powers at...
Just simply play what the first person plays first, then play what the second person plays........... at least that is what my dad taught me how to play