I think the problem a lot of people have is that they try to get it exact in the beginning. I don't think that's possible. As a beginner, you're going to mess up, or get the chords wrong. Just listen to the song for the patterns you can hear, probably the vocal part and bass, and play that. That's what I used to do. As I learned more chords, I'd add those. It should be fairly easy to play the vocal part of a song on the piano.