Graduate / Registered Dietitian - How to start a Career Objective essay: intellectual interests [3]

I Have been practicing as a Registered Dietitian since 2002, but now I want to pursue Masters in Speech Language Pathology.

A college requires a career objective essay of 500 words describing your intellectual and academic interests, accomplishments, and goals. if there is anything anomalous in your undergraduate record, please explain.

I don't know where to start.

Any tips/advise would be greatly appreciated!

Thank you!