An introduction must have your general main topic and that is only one, and then your three supporting main points, that support or explain your opinion in your main topic.
For your essay to be constructed correctly and clear to the reader, you must construct/organize your ideas clearly in your head and on paper BEFORE you begin writing your Introduction (Hook + Topic Sentence + Thesis Statement (saying what your 3 supporting reasons are for your Topic). Any questions?
How to Annotate an Article + Creating Your Response (Summary & Essay)