These essays are typically, "Do you agree or disagree? Why?"
So, the first thing to do after you've read and understood the topic, is to decide which way you're going to go. Do you agree or not?
(Let's assume you do).
Write the introduction, in which you are going to state that you agree with the proposition. You can say how strongly you agree, or say you agree with some reservations, etc.
Write the arguments for agreeing. If you change your mind about agreeing half way through the essay, pretend you didn't. Keep arguing the way you started - the marker doesn't really care what you think, as long as you're consistent.
Write the conclusion - make it compatible with what you've already written.
Student or Learner