[DRey]

That looks heavy! Not more than $1,000.

[Yosemitest]

Personally, I like the Benelli Semiauto Shotguns, but they run a little more.
Start here and look at the "Price :ow to High Choice", and I'd recommend a choice with the pistol handle like the Vinci Tactical Shotgun 12-Gauge for 2-3/4" and 3" shells with the Black Synthetic, Pistol Grip.

[Yosemitest]

Shotguns are all about barrel length, meaning the longer the barrel, the tighter the scatter pattern.
I really don't recommend an 18 inch barrel or anything shorter than 24 inches, because of the effective range of the pattern.
Also I recommend practice shooting, and plenty of it.
That will help you learn just what your shotgun will do with its scatter pattern at different distances.
Practice shooting from the hip also, so you'll know what to expect in the recoil and in your aim.
You can take your index finger and "point with it" above the trigger pull and just below or along side of the barrel, and pull the trigger with your middle finger.
With a little time and money spent on ammo, you can get good at "point and shoot", even from the hip.
But practice, practice, practice is the key, ... and clean you weapon often.