2 defensively accurate rounds on target in 1.5 seconds or less is the standard I suggest my students to get trained to. Obviously faster is better.
In my concealed carry classes we do this very drill with SIRT pistols and owb holsters. The students cant always do it at first but after 10 or 15 draws and some muscle memory, almost everyone can do it.
Why is 1.5 seconds such a magical number? It’s not. 1.5 seconds is an arbitrary number based on the well known tueller principal, that is the average able bodied man can run a distance of 21’ in 1.5 seconds. But we also know most self defense shootings typically happen at distances less than 15’. So really your draw and shoot should be much better than 1.5 seconds, if physically possible.
If your time to draw and fire is greater than 1.5 seconds you really should increase your zone of awareness accordingly. 3 seconds is a lifetime in a gunfight.
If you want to become a master at this, I encourage you to attend a USCCA Defensive Shooting Fundementals class. I can almost guarantee by the end of the day, you will improve most of your shooting abilities including the time it takes you to draw and fire.