Envisage this feeling post impact ... your torso faces opposite court and your shoulders are facing the left fence (side) ... feel torque in your chest area... this flings the hitting arm out powerfully
however, it is key to extend arm fully just prior to impact. The racket is offset at an angle and the entire arm is then rotated into impact via the right shoulder. This extends the racket in-line with the arm (post impact) ... NOT at impact
make sure wrist is in ulnar deviation and extension in the backswing ... and then release the ulnar deviation into neutral thru impact ... however, at impact wrist is still in extension albeit less pronounced