Finding the red dot on a pistol is all about your draw stroke and doing it the same every time.
I shot a USPSA open gun for a year or two and it does take practice finding the dot. Once you get it it just works.
As I am pushing the gun forward the muzzle is high. As I bring it down I first see the front sight. I know the dot is above the front sight and as I keep bringing the muzzle down the dot appears. That's what works for me.