Starting a Diagnostic Medical Songraphy essay

I am a High School Senior and just starting to write essays for scholarships. I am usually a good writer but for some reason I am having writers block. I need to write a 250 word essay on what my careers goals are in the Diagnostic Medical Sonography program. I am not sure on how to get it started. Any ideas would be appreciated.

Be sure to use your 250 word wisely- be sure that it is solid and has lots of quality content. You could start with a sentence that refers to you and your personalty, or mention that the field you intend to study is of importance. Elaborate on what interests and inspires you to desire that line of work. State clearly your short term goals (what you expect to gain from education) and long-tern goals, then explain how college will be the stepping stone you need to achieve your goals. Conclude with a solid sentence that "wraps things up" Good luck to you!