Right off the bat, I see several areas which need to be addressed.
1. You elbows are bent. Both arms should be straight and locked in an isosceles triangle with the body.
2. The body should be perpendicular to your target to form the isosceles triangle.
3. You need to lean into your gun when firing it. Since you're right handed, move your left foot forward a little and lean your body into your shots.
4. Your support hand index finger is in front of the trigger guard. Move this down to the classic hold for the support hand and great a strong hold on the gun for rapid followup shots.
PROPER PISTOL SHOOTING STANCE - YouTube
What I wrote above does not mean that you will always use this position technique when practicing SD shooting drills. No way this will be the case. There are going to be times when the Weaver stance will be your best bet or another modification of some standard stance. So it is best to train with different stances to achieve that muscle memory you want when you draw your gun. But the stance I mentioned above is the currently taught "best" stance to use for most situations.