would you say using one person's story to tell a whole is acceptable in this case?

Enrique's Journey is, for the most part, written in third person limited omniscient point of view: that is Eenique is who the author uses. Whether third person limited or first person, the reader can get to know the person telling to story very well. The reader becomes familiar with the person's personality traits and reliability as a character. This person lets us into their thoughts and motivations.