zougou
Here is some basic info that may just help you get through this period.
This is your first handgun but,
not your last one The biggest single difference between GLOCKs and most other handguns is the grip angle. If you like the grip angle of the 1911 you will probably be more comfortable with a SiG, SA X/D, CZ or Beretta than a GLOCK. GLOCKs are very good, very well made handguns but they do use a unique grip angle.
The quickest and best way to learn to shoot well is with Professional Training. The handgun itself is far less important than the hand holding the gun.
There are very few BAD handguns being made these days. The state of the art is now at a level that almost every manufacturer makes superb handguns. After all, it's been almost a century since something new has come along. By now, albout the only innovation happening is in materials.
You made a reasonable choice on your first pistol. With the additional experience gained, there is no reason to think that your future choices will be wrong. Just enjoy your CD and lust after your next handgun.