CandidateElias15, something you will learn to say is "remember, a half day of work in the Navy (can fill in any service) is only 12 hours long!"
USNA wouldn't offer you an appointment if they didn't think you could get it all done, as demonstrated by your achievements to date. You will be amazed at the geometric increase in your time management and prioritization skills. It's not just the homework, it's the uniform prep time, studying for plebe knowledge quizzes, stripping and waxing your deck and all the other fun and enjoyable activities (sarcasm and some truth) that go along with plebe life.
We have had plenty of aero majors in the sponsor family over the years, and just had 2 of our '14's choose aero. They picked aero because they enjoyed the briefs about it, talked to more senior mids in the major and thought about what they would like to spend time doing. Both are varsity sport folk, do other activities, and yes, they work very hard during the week and weekends to get it all done. They also find time to go see movies on the weekend, spend time on Facebook, snooze on our sofa and watch tv. You will learn by doing, and if you are already an organized and disciplined type, you will be just fine. If you are too rigid in your ways and get distressed when Plan A, B and C get derailed, you will get stressed out but learn to deal. If you are a fly-by-the-seat-of-your-pants type, you may crash and burn a few times before you learn to get a grip.