You applied to all sorts of types of schools. Have you researched the difference between research universities vs. LACs (some like Tufts or Dartmouth are in between)? What about the differences in education and assessment and ease/ability to take classes outside your major/course between American colleges/unis and unis in England (with Canada and Scotland in between; Canada more like the US and Scotland more like England)? All that information is online.
A lot of the information you’ve asked about is also online. How much research have you done?
BTW, unis in Germany (and some other places in Europe) are tuition-free.