the striker fire design of a glock is more simple compared to say a hammer gun. if you get a Beretta, one thing you should definitely practice is making it second nature to take that decocker/safety switch off and then shoot. you can't just shoot like a DA/SA Sig, striker fire gun, or hammerless revolver. some will say there aren't any safety's on a glock either, yet technically there are more (3). they're simple though and built in so people like the guns.
you should still be proficient dropping and loading a new mag, clearing jams or misfed rounds. more so in places like here in NY or other places where mag capacities are smaller. if you're put in the horrible position and must fire on someone then you better be able to fire a 2nd follow up or more, accurately and well within a second.
packin requires a lot of preparation and discipline. more than just shooting paper targets at a range. all I'm saying.