looking for my first gun.

[kmas]

All you need is the Glock 17, and you're set for life.
Enjoy.

[nikki#2]

1-Why are you buying this gun? Home defense, plinking, hunting etc.?

FWIW... My first semi-auto was a G34 tactical/practical. I've bought and sold many handguns since... but my AR/G34 combo remains my go-to.
Also many excellent training classes are available... incl. front sight near LV which offers several classes on both platforms.

[liberallyloaded]

1911 in either 45 or 9mm. That was easy- let the addiction begin!

[Trapper]

As others have said a good revolver or Glock 19 would serve you well as a range/home protection pistol. Don't overthink your first purchase, it's only a gateway drug to high end 1911s. All true addicts will end up with 10mm autos, N Frame revolvers, and 1911s...... Those who disagree are still in thee denial stage :-)