Once you reach your goals you will be in exactly the same place as those who are 25, 21 and 19. Don't confuse ambition with competitiveness: if you are strictly ambitious about your life goals then it really doesn't matter if someone else reached theirs first.
Furthermore, in some ways you are ahead. Having a "normal" young life is a good thing. In some ways I pity young successes like Evan Spiegal: they never had the camaraderie and joy of e.g. scratching together some money with friends for some beer and steak for a BBQ. In a nutshell, success is about improving your life, not replacing it. One day you'll value the days when you had the ability to procrastinate.
Furthermore, in some ways you are ahead. Having a "normal" young life is a good thing. In some ways I pity young successes like Evan Spiegal: they never had the camaraderie and joy of e.g. scratching together some money with friends for some beer and steak for a BBQ. In a nutshell, success is about improving your life, not replacing it. One day you'll value the days when you had the ability to procrastinate.