First of all, you should try to focus on your personal life experience.
People would like to learn about the things you have gone through instead of some imaginative things.
Tell about the personal struggles you have gone through to accomplish your internship as a bank cashier.
Provide the background of your sports achievements.
Even though the essay about you should be focused on your name and deeds, do not start writing with the trivial phrases introducing yourself.
It is still better to put an intriguing question which requires an answer in the end or begin with an interesting fact/quote/joke.
For example, you may be asked to write where you picture yourself in five or more years.
It is your chance to prove that high school or even college education is not enough. However, use the great words you know to explain why you deserve the place in the target educational institution or company.
From time to time, even personal essays should stick to specific rules.
For instance, the writing style is an obligatory condition.