@Michael Kantar you've already taken the first step here and that is thinking of your future and acting on it. I would highly suggest you focus on swimming since you are obviously talented in that area. I also believe that will open doors along the way since it shows your determination and drive are there. If your grades are solid, you could easily get a full ride to college and that is an accomplishment also.
I won't have the military conversation with you because I feel like that is something only parents should bring up with someone your age. As for real estate at 14, it will be a challenge for you. There will be people out there who just won't take you seriously at your age and that's okay. Just remember not to let these hurdles discourage you from this. I would look at what jobs are available to you, pick one and keep reading and studying real estate. If you already have this determination at 14, you'll easily be successful in life in whatever path you choose to take. You're awesome, Michael! Keep up the drive!