1. You do the CFA the second day you get there, which requires running. But there was only one morning where the PT was strictly running. You also play sports every night, which are pretty chill, but are cardio I guess. If your squad/platoon is late to something, your leaders will likely yell "double-time!" which means you gotta run. I've heard NASS is much harder physically. You'll be fine
2.
I haven’t been to SLE yet so I don’t know the answers to 1, 3, and 4 and someone else can respond to those, but the daily schedule is in the pdf on your USMA portal saying “SLE instructions”.
3. Hardest part... if you're female and you're on your period that week, thoughts and prayers to you. That sucked, big-time.
CFA is never fun.
On the last day (I think it's called challenge day or something), you go out to Buckner and do a bunch of obstacle courses. Those are fun, but after that, there's an activity where you're in a pretend mission. I was crawling on the ground, carrying a (fake) gun, which was fine, but the people running the drill were dicks and randomly decided when my teammates "died," which meant me and one other person had to literally pick up 3 people and their guns and haul their a$$es to the finish line because they were "dead." I don't know if that made sense, but you'll see what I mean. Those guys also made a lot of racist remarks, unfortunately (not USMA people).
Best part? Everything. Especially once you become friends with your squadmates and friend-ly with your squad leader, nothing seems as hard. Camaraderie will get you through those 5 AM wakeups. Cherish it!
4. I have no military background and neither does anyone in my family. I didn't even know you had to address the cadets as "Sergeant ____" or "Lieutenant ____." Know basic terms and vocabulary, like plebe, firstie, beast, etc.
Move fast. Don't look at or speak to anyone unless you've been told to on R-Day. I wish I'd taken more pictures/videos, but stay off your phone for the most part. You won't get another experience like this, so enjoy it!