Essay writing is actually very easy.
Essay writing is almost the same as how you write an essay in BM.
When writing an essay, use extraordinary words to grant a higher score.

Here's the format:
1st para: Introduction to what you are talking about.

2nd-4th para: Elaborate on the points that you are focusing on.

Last para: Conclusion of the topic that you are writing about. Hope for the future in our country.

Hope this helped you. Good Luck! : )