My buddy went through the marines and got hurt (gunpowder in the eye) and was honorably discharged, but he said it was pretty much like the movie Full Metal Jacket.

He even sang the "This is my gun..." song.

But if he can do it, then anyone can. He was a major slacker, never get up before noon, lazy, but he did it and it changed him a lot. He was a totally different person when he came back, but he doesn't regret it (but he also doesn't have to go to war).

Good luck and God bless.