Well you really need to try your hand before you buy. 9mm, 40SW, 45ACP, 38SPL, 380 etc etc, both revolver and semi, full size, compact, etc. What's your price range? That all being said, I could meet you at Kokohead, bring my Ruger SR9C, S&W SD9VE, Kimber Ultra Compact 45, Full size Kimber 45 and my SP101 38/357mag. Of course, would need assistance cleaning the ones you shoot 
One suggestion though would be to get a nice 22LR pistol, either semi or revolver and learn on that, then move into the higher displacements. A 22, in close quarters, will terminate any perp IF you are well versed with it. Stinger high velocity, hollow points will do the job while you are waiting for the larger bore. What you also have to consider is if you miss, you don't want it to penetrate your neighbors home. There is ammo that is designed just for that but the brand(s) escape me now.
Remember dead men don't talk, wounded ones do.
Let me know. Glad to help (of course you gotta but the ammo  )
r
Gil

   Anyone in the know, (obviously Bota) knows dry practice is where it's at and is advised by all legit instructors.
No ammo cost, do in your own home, builds muscle memory and firearm familiarity.
   All you need is a couple mags and some snapscaps/dummy ammo.
We strategically put post it notes around the house where discharged projectile ''may" go to practice.

  No need to rent to try, go to both FunShoots. 

 The fact that you've " decided on the Glock 19" primarily because "my wife could shoot it well." is a good start. 
(Keep her happy and you'll get less flak when you buy more guns  )

  With your "$150 max a month towards saving towards additional guns, ammo, parts,", pick up a .22 conversion ( again I recommend the TSG for keeping the gun more to actual 9mm weight  and their service has been great) and you'll keep your budget down.
This will also be an advantage when you bring your daughter into the game as then you'll be buying ammo for three!

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