Enough with the training non-sense over and over and over again. Sure it's important. But HOW do you know if I have trained or practiced with the gun or not? How do you know if I have fired it once, or 1000 times? How do you know if I don't practice drawing it from a holster and practice it dry-firing?
It's because you're asking dumb questions. Put more delicately, you're asking the type of questions that people ask when their plan is to buy a gun, put it away, and assume it will magically repel all evil.
Even this quote suggests newb. If you had fired it 1000 times, that doesn't mean anything. You don't fire it 1000 times and are then "done," and put it away. Firing it 100 times a week would suggest familiarity. I have a friend who once cut down a tree with his Sig .40S&W, he fired something like 3,000 rounds. He is one of the worst marksmen I have ever seen, he sometimes misses paper at 7 yards.
The revolver vs. automatic question has a lot to it. You would be concerned with capacity, dealing with recoil, clearing malfunctions, reloading speed, how you will carry spare ammunition, accuracy with one of the most difficult to fire accurately guns made, etc. You don't ask about any of this. You ask about how often you need to clean it.
Once you explain that your plan is to practice with a Glock 19 and carry a Glock 26, you move from "complete newbie" to "still doesn't quite get it." You need to shoot the gun you carry, period. You're on the right track, with the practicing, but you're still developing habits that will hurt you in real life. Like using your pinkie to stabilize the gun, and having 15+1 on tap before needing to reload. You will practice reloads less often because you can probably complete some IDPA stages without doing it at all. Etc.
So, I mean no offense, but don't be surprised when we jump on you to take a class. You're asking all the red flag questions, and seem completely oblivious to all of the stuff that matters.