I'll help you out, mane. A good choice would be getting a 9mm or .38 (357) caliber round pistol. If you go for the pistol, go but the Glock 19, with a round right, a iron sight on the glock 19 is fucking garbage, but the round sight is pretty good. If you want something "special" in the pistol category, get a Five-SeveN, but they may not be legal in your area, and the ammunition is somewhat harder to come by with. They all have really low recoil, so you could hold it in one hand and a flashlight on your non-primary hand.
If you want a Semi-automatic SMG, get a Uzi, however getting a Tec-9 is a dick move because they're generally fingerprint proof, and are absolutely branded illegal in the US, and so is the fully automatic model. The Uzi is somewhat high in recoil, and you might need a stock if you have weak wrists. If you want a semi-automatic rifle, consider a M-16A2 civilian model, or a semi-automatic AK-47, or the 74u variant. You can buy a AK for 500 to 750, and everything else is a rip off, unless it's lower. The AK-47 has a very high recoil unless you used one for periods of time, and they are absolutely legal in the US. The M-16 has to be semi-automatic.
Don't go for shotguns, you'll mess up a wall if you shoot down a hallway.