Nice purchase Icarus. That's some cheap fun right there.
Of course it is, but it's still a pistol and it will still be just fine for honing skills that will be used later on with a larger caliber handgun. I learned to shoot with .22LR rifles and pistols. To say they didn't help when I moved into firing large bore centerfire rifles and pistols is a lie. Learning with a small bore pistol or rifle would help you to not develop bad habits, like flinching, or jerking the trigger anticipating heavy recoil. (Which sometimes is not all that heavy depending on what your shooting with.) A .45 ACP pistol is not exactly a hand cannon, someone who has never fired one, could, with proper direction be doing just fine with a .45 after just a few hours. With prior pistol handling experience, no time at all, even without direction. In the service they first fire air powered and blank firing handguns, they would not do it if they didn't learn anything from it.