Well, you showed great wisdom by buying one of the best pistols ever made, but bought it in one of the worst calibers ever made.
I don't think 40 is the worst caliber ever made, by a long shot, and TONs of competitive shooters still shoot it.
I have never understood the 40 hate on NES
People that love 45acp will shit all over 40, but depending on the ammo, there is virtually no difference in recoil. But someone on the internet said they shouldn't like it and 9mm is easier for female and limp wristed cops to shoot.
However, I did buy a 9mm barrel for it. Not because I don't like 40, but because 9mm is cheaper and plentiful.
Any one who has knocked down steel targets with 40 and 9mm knows instantly that 40 hits much harder. Those that deny, or cite ballistic gel test are either lying or never shot it.
Some people will say it doesn't matter for self defense. And it's true that when shooting gel performance is similar. Unless your target is wearing soft body armor, or behind a barrier, like a car door.
Soft armor will stop 9mm and 40. Neither will penetrate, but that target is going to be hurt a lot more with the 40.
Some people never envision a scenario where a target might be wearing soft armor, but I can.
40 is just another tool in the toolbox. Hating it is like hating a socket set because an adjustable wrench can do the same thing. But I bet you own both.