A really easy way to start to develope your ability with an arranger keyboard is to edit an existing style. Go into the composer function on your yamaha and simply delete a track. Then try to play something in that track yourself. Change the sounds, Change the quantize rate, Add some additional percussion. Start playing with copying tracks from one group of styles to another. I promise you a whole new world of creativity will open up before you !!!

Dont try and learn every function of the keyboard in a week ! Decide that this month you are going to explore the composer function. And try and make something musical at the end of or during the process. Be even more specific, promise yourself that you are going to play with just the drum track in an existing style, substitute the kick drum from the existing drum family to say a funk or rock kit. See if you can increase the loudness of the hi hat by increaseing the velocity value.

Dont try and do everything at once. Remember you eat an elephant mouthful by mouthful. (never understood why people eat elephants but there ya go !)