Essay goals, ambitions, carrier goals and reason of studying abroad

I need to write an essay describe about my goals, my ambitions and reason of studying abroad(maximum 500 words).
Could you tell me how to write it?
I want to study International Business Administration.

In my opinion, stating a personal experience through which you could find your interest in this field of study, is the most interesting and the easiest way for writing an introduction. In the body mention your goals and dreams and try to connect them to the field that you are going to study in. In addition, state the advantages of studying abroad and argue why these positive aspects are not available in your country. If you want to apply to a particular university, you should also write about that university and say why you chose this place for pursuing your interests and goals.

Hope this helps
Regards
Ahmad

Could you give me an example of starting essay?

Just google it to find loads of samples with similar topic. You can find helpful points in SOPs. Google "writing a great statement of purpose/personal statement" and read the samples. This would be very useful.

I wanted to become an Athletic Trainer - Career Goals intro

I learned how an Athlete could come into a clinic so frighten thinking the worst and leave with a confident smile, how an athlete can sprang an ankle n be bak in action within three to four days, and how an incomer could chang's an athletes life forever. Since then, i knew i wanted to become an Athletic Trainer in my career.