Learning by ear is a skill you need to learn how to do, so as others have said, just poke around and get used to knowing your box and what sound comes from where.
Also the Homepage ( left hand side ) has a list of keyboard diagrams.
Check out the one you have, I found visually seeing what the keyboard layout looks like helped me when first starting up. I printed off 2 copies and went as far as to colour the buttons for a push and what ones were pull. It helped me at the start.
Getting to know your box is a great help when starting out!
Good luck.
cheers
Q