Naval Academy Admission

Hello I’m a soon to be 21 year old in the next week. I have recently decided enlisting in the Navy is the career path that is for me. I am seeing what others think about my chances of gaining acceptance in the Naval Academy. I have completed one year of higher education. I am thinking about enlisting in the Navy for a short period of time and try to apply to the Naval Academy after I have enlisted Active Duty. A friend of mine told me about the Naval Academy Preparatory School, would I be able to take advantage of that and have a better chance to get into the Naval Academy? I’m just trying to figure out what I can do right at this moment to help my chances of getting into the Academy. Thank you for your time.