voyage dans le temps help me! please corrige me!

Sujet du devoir

imagine you can travel back to the past;write a story describing your arrival in the period of your choice.

It was in 1980, I had arrived in my father's house, he was the same age as me and I could see my grandfather and my grandmother. I then explained to my father and my grandparents that I were coming from the future, they did not believe me and they made fun of me. But after showing the photos of my father and mother, my grandparents finally realized that I was in their family. The problem is that my father did not believe me, he was really arrogant. I took my bag and I took in my bag a letter from my father of the future, then I passed this letter to my father from the past. When my father from the past had read the letter, he immediately understood the situation and he immediately trusted me. After a long discussion with my father from the past, I went to see my mother's family.
My mother's family reacted in the same way as my father's family, but then after a very long explanation, they realized that I was in their family. I talked a little with my mother from the past and I went back to my father's house. My father's family was very poor, but now my father's family has become rich thanks to the knowledge I had acquired in the future. I even gave my mother a cookbook to learn how to cook. I gave gifts to all the family of my father and mother of the past so that he does not forget me.