It’s not too late. AU tracks interest up until decisions are released. The deadline for ED1 was today, and the deadline for ED2/RD is Jan 2. However, there is no greater interest than applying ED. Ultimately, OP you have to make up for your GPA and test score in interest. Highly recommend emailing admissions to get connected to a current student. And tour.
Also, run the NPC. Merit scholarships are based mainly on GPA and test scores, so it’s extremely unlikely you’ll get one from AU. You may qualify for need-based aid.