People get wrapped around the axle about this. If you don’t know the military doesn’t turn you into John Wick. Most people in the military have never been issued a gun outside of qual, but all are given a bare minimum level of training just in case things got dire.
Annual (if that) weapons training is basically “don’t tk your buddies 101” a bit of shooting to prove you can and cleaning after. You only get more if direct combat is your actual job, or will be soon.
Just like anything else if you want to get good you have to put in some effort on your own time.