I will tell you that you don’t need an introductory paragraph, at least not of the 1) topic sentence 2) structural methodology 3) thesis statement variety that we were all taught in high school.
In my opinion, the author has all her thoughts structured so incredibly well because she is one of those organized brain people who also has a gifted talent for writing. If I were to try and do this, it would come out like I talk, the whole essay would be everywhere the reader would be so confused, which is why I need to stick to the traditional form of writings essays.