Read this excerpt from an essay. What is the author’s main purpose?
My first day of high school was a total nightmare. I will never forget that day. I was a skinny, freckled, 14-year-old nobody. I just wanted to blend in, but I somehow spent the entire day being noticed for the wrong reasons. I messed everything up. I forgot my books. I went to the wrong classes. So when I went to the wrong lunch session and ended up in a room full of seniors, I wasn’t surprised. Luckily, someone came to my rescue. Sensing my anxiety, one girl pointed out that I was lucky to be lost in that room because it was the meeting place of the school’s new Community Service Council. She volunteered to take me to the food court and told me to ask her if I ever needed help. Beneath the red, white, and blue school banners, I watched her skip away to help another boy who had dropped his tray. Apparently, I wasn’t the only one having a bad day. The Community Service Council ended up having a huge effect on my high school life. I just wish I could have found it in a less embarrassing way.
to inform readers about a normal day at high school
to persuade readers to join the Community Service Council
to entertain readers with a funny story about the first day of school
to express an opinion about the importance of community service

The first sentence "My first day of high school was a total nightmare" has the overall idea of the excerpt, which it's to describe that personal experience. Through the text, they explain how apparently they did everything wrong in a humorous way: they forgot his books, went to the wrong classes, went to the wrong lunch session and they even ran out a girl from the new Community Service Council by mistake in a funny and embarrassing way, and the girl volunteered to help them. In the end, they do recognize that the Council had a huge effect on their school life, however, the main purpose of the narrative is to entertain with a funny story about that experience because it is what mainly the text is about.