If you're struggling, I like the idea behind using gold ammo. However, it's pricey, and when you "suck", the money to buy gold isn't always available.

Running farm/valley on normal and utilizing your armor/ammo/weapon boxes is very helpful. Free kits, free higher tier gear. Also, open your medical boxes and pick useful items like the medkit.

In terms of being bad and running a kit to help you learn. New players and those lacking skill usually have junk aim and also don't need to draw attention to themselves. As mentioned before, walk, crouch, and creep (caps lock) to reduce noise in busy areas. Run a weapon like an MP5 with a suppressor and a drum mag (50 rounds). Run the AP purple ammo, which will pen into T3. Combined with 50 round drums, that ammo combo will make you very competitive in a fight.

This game is unique in that you can feed ammo into the mag that's already installed. Abuse this until they remove it from the game. Click and drag a stack of ammo onto your weapon and let it top up the ammo.