@CitizenX gave the answer.Quit watching YouTube videos of self proclaimed geniuses and take an actual class from a pro. You will be glad! Read the actual manual and not someone else's interpretation. I've seen a lot of screwed up interpretations, I'm assuming you have enough sense to properly interpret it yourself.
Getting training is not about learning how to shoot your gun at the range or in competition but how to fight with it and save your life. Isn't that the purpose of having a self defense firearm? Training will teach you how to manipulate your firearm in such a way that if you practice enough will become automatic and could save your life. Once you learn these techniques you must continue to use them when handling your firearm whether you are on the range, dry firing in your home, in a competition or in a fight. Not doing so will only introduce bad habits that can get you killed in a bad situation. Using the slide stop as a slide release is just one of those bad habits.
Edit: Speaking of pros, here is a video of Clint Smith who owns Thunder Ranch giving instruction on malfunction drills. Part of those drills demonstrate loading the weapon and to clear a malfunction, (essentially one in the same) notice how he does this in the second half of the video. Training yourself to do this automatically will help you when you are under severe stress and in a really bad situation.