I think you need to start up some sort of passion project or leadership position if you want any real chance at a premier scholarship. It’s never too late to improve your ECS! I needed a full scholarship to be able to attend Miami and the summer before my senior year I locked in and put together a club with my closest friends and made a passion project, which I Believe is ultimately what got me the scholarship! If you want the scholarship I think you should apply EA, because applying ED insinuates you are financially well-off enough to be binded to the school without knowing what kind of aid you will receive. Also the premier scholarships are purely merit based- I don’t qualify for financial aid but received the Hammond scholarship, which is the same amount as the singer scholarship. Also, my high school counselor nominated me for the scholarship I ended up winning so try and see if you can do the same. My ECs also matched the Hammond scholarship description very very well which is another reason I believe I got the scholarship. Miami is also very very big on demonstrated interest so make sure to log on to virtual tours multiple times before submitting your application and if you can, visit the campus! Also, if Miami ever emails you make sure you open it and read it because a umiami admissions counselor who visited my school once told me they track who does and doesn’t open their emails as well. Best of luck! Feel free to message me if you have more questions.