I'm a UsArmy woman, but fwiw:
It's easier than it sounds. I was pretty scared going in, but after a few weeks you get the idea of what's going on and how to deal with it.
Just remember not to listen to the idiots who say things, "Guys! Quit fooling around! You're gonna get them mad at us again!"
Tell that moron that it's basic training and the drill sergeants are going to be outraged no matter how well you guys are doing, for at least the first two thirds of it.
Anyway, most of it's actually pretty fun after the first few weeks of processing days and what-not. You just have to get over the mental stuff. Anyone can do push-ups and sit-ups with the amount of practice you'll get there. Unless getting yelled out by someone you've never met who's only doing their job affects you personally, you'll be fine.
What Fort are you doing basic at?
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