Creating audio tracks in Cubase from my Yamaha PSR 900

Hi , I am new to using Cubase and looking to get some advice . I create a song using different styles on my keyboard and then looking to have each of the tracks created in Cubase . I use elements 12 currently .

Currently I create an audio track in cubase and record each track from Yamaha in cubase . I use the click on cubase to give the start so I get this accurate Is there a better way for me to just open all the tracks as audio files automatically in cubase with the sounds and chord patterns of the Yamaha ? I am looking to then export the individual tracks and then send it out to an audio engineer to mix and master the song for me . I am looking to learn a more simpler process rather than recording each individual track separately from the keyboard