What are my chances of getting full OOS tuition to Miami U of Ohio/how can I improve them?

@stem143. I can’t answer your question directly, but perhaps I can give you one data point. My son is a freshman engineering major from Arizona. He attended the number two-high school and top charter school in the United States and graduated with a 3.6/4.0 GPA. (The school does not rank.) He was captain of his basketball team and made all-State in his division. He took and passed 13 AP exams with an average of 4.53, including 5s on AP Computer Science, AP Physics B, AP Physics C (Mechanics), AP Physics C (Electricity and Magnetism, AP Calculus AB, AP Calculus BC, and AP Calculus Biology. He worked about 140 volunteer hours at a local hospital. He scored a 33 on his only ACT exam, including 35 on Science, and 34 on Math. His award from Miami was $20,000/year.

If you look back on this forum, you can get some more data points and better assess your chances.