Mike started his daughter out playing softball before she moved on to golf. The baseball swing is identical to the one-plane golf swing; the only difference is that in golf the strike zone is on the ground where your ball is.
Choke down on the club, make a three quarter swing and pick the ball clean
Your posture is determined by your arm swing. If you swing up and down on a two plane swing then you should stand more upright. If you swing your arms around on a one plane swing then stand more bent over on the balls of your feet.