first person storytelling is characterised by telling the story through a certain characters eyes usually the main character the story is told strictly told through the eyes of the character.
an example of first person would be, as i walked down the street that summer night i felt a cool breeze blow down the dark dimly lit street.
fourth wall
the fourth wall is usually characterised by making overt references to the fact that the world or characters in the world is a fake story usually the character breaking the fourth wall is well aware that they are a character in a piece of media and can also be seen when a character talks to the viewer or reader directly.
an example could be taken from the comic character Deadpool, in almost all of the media he is portrayed in he can be seen acknowledging the fact he is a comic character and constantly talking to the viewer even pausing the action of some scenes to do so.
the third person
third person is taken from the perspective of a narrator telling us the story while not actually participating in it.
an example would be, as peter continued down the street that late cold december night he stumbled on the toy of a child a small frozen tin soldier.
