Hi and welcome Monica ,
My humble suggestion is you go and explain what you just told us to your teacher. S/he may be taking for granted that everything's crystal clear. So maybe go up and politely ask for further clarification would be your first step towards a better piece of writing.
However, maybe the problem lies on the topic you have chosen. Perhaps choosing something that is closer to you (a hobby of yours, for instance) and thinking about whether it is popular or not and why you started with it would be a good beginning.
Student or Learner