Chances of getting into northwestern?

I’m only a junior, but Ive been looking into northwestern university for a while now and am wondering what my chances would be at this moment in time so I can improve.

GPA: 4.5
Mostly a’s with a few b’s here and there.
ACT: 31 (that was without any prep. I’m taking a prep class now and will take the act again to try and get it up)
I’m taking the SAT in 2 days but I’m not too concerned about that.
Extracurriculars:
Diver on the swim and dive team since sophomore year
Varsity gymnastics since freshman year
Student council freshman year
Mu alpha theta
NHS
I’m an English tutor at my schools “lit lab”
And very involved in my churches youth group
Over 200 community service hours

I know thats not a lot of info but based on that, where would I be? Thanks!

Oh and I’ve been in all honors/AP classes since freshman year

ACT def low for this school. Seems like everyone is near perfect. It’s gotta be a good fit…here not only grades count but your essays! Touch base with the local rep and see if you can form a relationship. Show interest early and often. It’s a crazy hard school to get into and they tell you “We turn down 4.0 kids every year, doesn’t’ mean your not worthy just means it’s not a good fit for both of us”. Having said that about your ACT…it’s actually good and kids have gotten in with lower but you gotta give it your all to be here…