How do I write a story correctly?

Hello. I'm currently writing a zombie story. Here it is: https://www.wattpad.com/story/334274066?utm_source=android&utm_medium=link&utm_content=share_reading&wp_page=reading&wp_uname=Dark_Mind_28&wp_origi nator=jkUpJUNCtF%2FB1aZ2E%2FyDZtRroyPgYHGPKe20r6V75AJpmK83KOUPmUMB6Cu4%2FJ 5aNTdB4nF%2FFB%2FnAJGcoA%2B%2BYJIQdxplK36uGqvUrTQppLuy8s5fNDIvGGxZzHRJcsgH I find it difficult to formulate sentences well. What do I need to pay attention to in order to make the story exciting?