I think the Y-harness is the best option for us beginners. It's too early to be thinking about whether both servos are trimmed exactly the same, etc. Using flaperons might seem appealing, but this function reduces the amount of aileron action you have when landing, and entirely changes the flight characteristics of the plane upon landing. Then you start getting into other mixes. Again, for a beginner, don't bother.

Like Ken said, just plug in the Y-harness and forget about it.