Can I STRONGLY disagree with lilmod about Michlalah (especially as I’m unclear why she thought it was a bad idea)? It sounds like a great place for you! You will find a lot of girls very similar to you (I know one girl almost certainly going there next year who I could actually see you being friends with from your description of yourself 🙂 ) and it’s an amazing place. I believe they’re getting a new program director who will bring it in a slightly more MO direction than it is now (it’s currently being run by a charedi woman). But there is a serious mix of teachers, and you can definitely pick the ones who you work best with (I did, and I had an amazing learning experience).
I wouldn’t necessarily pick a BY seminary- they are much more likely to try to dissuade you from dorming in college. I do agree with lilmod’s recommendation of MMY. (Again, I’m unsure why she recommended it over Mich.) I have several friends who went there and loved it.
If you want something more on the quirky-BY side, perhaps Midreshet Tehillah? I know a girl who went from there to Harvard, and she described it as a balance between a bit hashkafa-driven than Michlalah and yet still very intellectually motivating. The girls are probably more modern than the average Mich girl, and about the same as MMY girls. (However, MT is more likely to get LW BY girls, and MMY is more likely to get RW MO girls. Michlalah gets both.)
If my personal background makes a difference- I went to a middle-of-the-road, BY type high school and am now in Stern.