Case Western Reserve Merit Scholarships

Hello! I’ve just admitted ED II to Case. I have a financial aid package of $44,301 for academic year 2017-2018. But that package includes an University Loan of $3000, so it means that this year I have to pay $28,000 in total, that is too much for my family (though we can afford it). I know it’s quite too late to apply for additional merit scholarship but I just wonder if I can earn more scholarship in sophomore the next two years in order to help pay for my tuition?
I intend to major in Biochemistry. Is the Co - op program available for Bio - chem student? What kind of scholarship I should notice and apply in my 2nd year?
I am learning AP Bio and AP Chem. Will them help in my study at Case? Like replace a course at Case?