Q: ok i have figured out what the notes sound like (i have pressed every key). what do i do next?
A: use them in any way you like. try pressing 2 notes at a time. try pressing notes and holding them, or pressing them fast. try pressing no notes. try as many things as you can. the more you play, the more things you will discover. the world is yours. enjoy. if this is not enjoyable you may also leave the instrument