It's all about sight picture, and that front post. There's a technique for defensive shooting that's more commonly used for folks who are left eye dominant, but right handed. I'd say you certainly qualify as "left eye dominant," and this technique will work just fine for you.
Observe proper sight picture for a right handed, right eye dominant person.
There's a little bit of right-leaning cant to the pistol there. I chalk that up to wrestling with the camera while taking the shot. Good focus on the front post. Just put a blurry target behind that front post, and that's about perfect sight picture.
Now, a lot of people in your position think they need to move their whole head around, and keep the gun vertical to get good sight picture. This is a mistake. At combat ranges, a little cant applied to the pistol is
not going to significantly affect your POI. So drill this, cant the pistol towards your dominant (good) eye. As illustrated below:
It does not take much practice for this to start to feel
really natural. Give it a whirl. Put a few hundred down range like that. Practice draw-fire dry fire drills at home. You'll be amazed how quickly you begin to pick up that front post and get on target.