In the one plane swing you bend more from the hips, your arms are hanging down and swinging around your chest and your finish is more rounded. It is easier to maintain because there are fewer moving parts than the two plane swing.
Play the ball off your front heel, open the clubface to one o'clock, balance slightly on your front leg and make sure you swing down and through to the left. The key is making a non violent full swing, splashing the ball with an oval area of sand out of t
Let the club you are using measure your length from the ball by maintaining the same posture for every shot regardless of the club you use