This song is really bass heavy to me. So, my advice for someone playing this song w/out a bass player is to practice playing bass on the keyboard. Listen to the bass on the song, and try to imitate that on the keys. The chording is really simple, so that shouldn't be too much of a problem.
Once u got a good bass pattern going, slowly incorporate playing chords with it until it all gels together. This style of playing is not something you will just automatically pick up. You're gonna have to work hard at it because your hands will be playing 2 totally different things at the same time. That takes time to get good at.
