From a Straddle position , tilt the hips slightly to create a diagonal. Keep the legs tense and pulled in towards the body, so that your legs and hips don't drift too far out.
Push hard through the base hand. Tent the fingers of the support hand.
Once both arms feel stable, lift the support hand a few inches off the ground. It is best to reach the arm out to the side at the beginning. Focus on reaching the arm long to engage the Upper trapezius muscles of the support arm. Attempt to hold this position for 30 seconds per side before trying more advanced skills and drills.