I went 2 years ago when it was SLS. SLE will not be very physically demanding, so I wouldn't worry about that too much. When I went, we did 3 classes and went to a lot of briefings where we learned about USMA. There will be time to talk to your squad leader about what it's like to be a cadet and for them to show you around. The PT is not challenging; there will be some running but not much and not very quickly. I can't remember the exact distance but it was definitely under a mile for everyday PT. In the evenings, you'll play dodgeball against the other platoons. There's also a day where you go to Buckner where you get to try an MRE, do some obstacles, and learn some combatives (this is what you need the jeans and longsleeve shirt for).
CRL 123, I am a female too and I would say the best thing to do is keep working out and practice your push up form. This is what I struggled with a lot before I started really working on it. I recommend getting the 100 pushups app for your phone and working from there. Before I went to SLE I was terrible at pushups but by working on it, now I can do over the max for the APFT.
SLE is a really fun time and I enjoyed it a lot. Before going, I wasn't really sure about wanting to go to WP or even wanting to be in the Army. But at SLE I learned a ton about the academy and about the opportunities you'll have as a cadet and as an officer. I ultimately was QNS and received an ROTC scholarship (I'll be going into my junior year of college now). But SLS was a good way to learn a little about the Army/West Point and what to expect as a cadet.