You could do a lot worse than a Glock.
The 19X is the kind of Glock that grows on you. You might want to wait on the Glock 45 (MOS) though.
The order you buy your 10 handguns in isn't really important.
Get a 1911 or another gun with some substance, preferably in a .22LR for starting out.
If you're intent on a plastic gun, there's a .22LR Glock coming out.
Smaller caliber is better for learning the basics of handguns so you don't pick up bad habits.