If you switch your controls so that your B button is jump and X button is special, you can flick your thumb down the controller pushing the Y button, B button, and down on the C stick (the yellow one) in that order. That will make you jump twice as Y and B are both jump, and then attack with the C stick making DR. It takes practice and you won't get it right away, but trust us when we say it's the best/easiest way. And as for learning how to use new controls, just play with that setup for a couple hours. At first you'll most likely hate it and do horrible, but give it time and it'll be worth it.