>>64125738 (OP)
The only reason to buy a G23 is because you are getting a used one for significantly less than what a new G19 costs and you plan on getting conversion barrels for 9mm and possibly 357 Sig (if you hate both your wrists and your wallet).
I've had one for years and the only reason I ever shoot it is because I keep stumbling over somebody trying to dump a bunch of 40 S&W for cheap. It isn't particularly pleasant to shoot, and the 9mm barrel is slightly loose so accuracy suffers. For a beginner, such a gun would be frustrating for learning the basics.
Reliability isn't a problem, unpleasant recoil is.
>38 Super 1911
Not a terrible option, only now you have expensive ammunition. I like 1911s, but if you are going to be shooting a lot, 45 is a bit cheaper and I think it is part of what makes the 1911 special. Gimping yourself early on with expensive/hard to find ammo isn't going to help.
Really, if defense isn't a concern and you just want to learn the basics get a Ruger MKIV. It is a pistol in .22LR. dirt cheap ammunition, almost no recoil, super easy to clean (NOTE: older models like the MK I, II, III are remarkably annoying to strip/reassemble).
If the gun needs to do everything, Glock is fine but get a 19, not a 23.
>>64125968
40 is great for security and police because it can go through barriers like car windshields a little easier, but there is little advantage other than that. For a regular Joe, the lower cost/recoil/higher mag cap of 9mm makes way more sense.
>>64132714
If getting a G22, why not either a 17 or move up to a 20?
>>64138695
Where did OP say anything about a Mini-14/30?