You posted that you attend a public high school in New England. [ETA - I see you just posted that are in Maine] How do your stats compare to the stats of students from your high school who have gotten into Brandeis, Bowdoin, Tufts in previous years?
Maybe you can get this information from your guidance counselor. Or, from Naviance if your school uses it to track application outcomes for every student (some schools are more diligent than others about getting their students’ admissions decisions into Naviance).