Hope you enjoy your machining and gunsmithing courses.
A few things I think might help you:
-> Learn to read a Veriner scale on ether a caliper or a hight gage.
-> Learn to sharpen drills.
-> Learn to form cutting tools from HSS blanks for the lathe.
->
Stay safe, wear safety glasses at all times, might want to get a shop coat from like Marks Work Wearhouse to help deal with the hot chips that might fly at you. Also the shop coat helps you to carry at hand your scriber, tap drill chart, calculator, notes etc.
-> The machines CAN hurt you so be careful and think twice before doing something. Never put your hand near a cutting or rotating surface be it a Endmill, lathe toolbit, the work you have in the spindle of the lathe, a drill bit or a grinder wheel while the machine has power to run it shut the machine off completly and wait till the machine stops moving completly! And don't start grinders while facing the rotating part of the wheel they might crack.
I realize most of these will be covered but I feel they are important and many people dont take the time to learn these things right or fallow the safety rules well.
Stay safe and have fun.
Dimitri