I have a world in which one side of a conflict has access to a sort of magical musket. These muskets are modeled on muskets in the time period when Europe was first colonizing the Americas. I describe them in more detail here.
The important part for this question is that they are about as effective as real muskets were, but they don't have to be reloaded. Instead they recharge slowly after a fire, taking about as long to charge as it would take a musketman to reload them, but without the gunman needing to go through the steps to reload.
The side using these muskets will have a very small standing military, along with a number of small lesser trained militias stationed in every major town. They will have to depend on these smaller militias and novice conscripts quickly trained in basic combat to expand their military when invaded.
Militia men are mostly trained to drive off monsters, not fight soldiers in war. Monsters are strong and common in this world, but are usually disinclined to come too close to human settlements. Militia's men usual job is to line up at a distance and take potshots at monsters (their accuracy is bad, but they can afford to shoot many times until they hit), which hurt but don't do serious damage to the monster, in hopes of hurting it enough to run it off before it gets closer. These militia men don't often expect to face real combat, against soldiers or monsters, just to scare off foes disinclined to come closer anyways.
For this question I'm trying to figure out how difficult it will be for these less trained recruits to use their weapons, and how big the difference between a raw recruit and a fully trained soldier in terms of combat effectiveness. As such I have a few closely related questions:
How long would it take to train an untrained conscript to minimum basic effectiveness to be useful in an army (especially a very small one)?
How effective would such a conscript be relative to a fully trained soldier?
How effective would a partially trained militia man be compared to either a new conscript or a fully trained soldier?