You can find the Daisy Power Line 415 BB pistols Online for less than $35 at this time.
So here is the setup for easy loading so that when the bbs drop past the feeding hole on the pistol they are simply caught in the plastic tub. A plastic container such as this old tennis ball can is better than the one the bbs come in. You can pour them easily into your hand and when you accumulate enough in the tub it’s easy pour back in the can.
Have a tube of pellet gun oil to rub a dab at the top of every Co2 cartridge before you install it in the pistol. It punctures easier, protects the gasket, and is easier to remove the Co2 when empty.
Notice the eye-guards. Wear them every time you shoot.
I practice with two pistols and have two holsters on the same belt. One at 3 O’clock and one at 5 O’clock. You have more practice shots and train for draw and presentation from both locations.
4 Co2s will get you at least 400 shots, 400 trigger pulls.
Do that a few times a week and you’ll see incredible improvement in your shooting skills.