Free write: What I Want

Lately I've been doing a lot of thinking.  Mostly about my future.  I know people always change their majors in college but I want to make sure that I pick whats best.  I had a plan to open up my own gym in the future.  I planned on getting a personal trainer certificate, work at a gym until i had enough money to start marketing myself at my own gym, and attempt to open a gym in other cities.  I would've been the founder of the gym and I know it would take time for this to happen.  This was my mindset last year as a Junior.  Now as a senior I want to work as a F.B.I agent.  I have 3 things planned out depending on what happens after high school.  First one, I graduate from high school, go to college and major in criminal Justice, once I graduate I would become a police officer, work up to detective, then transfer to F.B.I.  Second one, after high school graduation I would train up to a year to prepare myself to join the Marine Corps(joining has always been my dream), after the Marine Corps I would try to apply to the F.B.I and NYPD.  Either way I will try to work for the F.B.I.  Last one, I will go to college and apply for a ROTC or NROTC scholarship, train in college and still get my degree, I would ship off to the Marine Corps for 3-4 years and apply for F.B.I and NYPD.  This is just me writing down my goals and how I want to come about them.  Please feel free to give me some suggestions, advice or opinions.