It’s literally ALL marching and formation drills. How to not-shoot the guy in front of you, how to place your feet when firing, how to go from colums to line. Marksmanship isn’t in there, bayonet practice isn’t in there. None of the actual-killing-the-enemy was considered required knowledge, because the formation stuff was considered FAR more important.
And as a reenactor who has been clubbing in the back of the head with a musket more than I count (on account of being clubbing in the head a lot), this stuff really isn’t as easy as it looks. The French might have had a YEAR to learn this at first, the latter recruits had a week.