How does one write (or me telling the story of how I've learned writing)

1st grade

I remember that the first time I wrote a real stories with a plot was when I was in 1st grade.

You see, my teacher had told us (once we learned how to write) that we could write stories and read them for the whole class to hear.

You have no idea of how many stories I wrote.
There are some stories that I remember :

There was one about a rat named Tomate (fun fact : his name was originally Thomas but because it was the name of one of my classmates' brother, I changed it) who lived in a house with his friend Nate, and they were scared of a cat which lived in the house, one day, while they were getting food, the cat spots them and run after them and both Tomate and Nate run away before the cat starts vomiting and crying and tells them that he's sick and just wants to be their friends, and in the end they become friends.

There was also this story about animals living in a forest named the Sport Forest and decides to organize Olympic Games within the forest, we follow Noisette (that means Chestnut), a squirrel who wants to win them, a horse I'm pretty sure was named Judith (it was 10 years ago, I don't remember all the names) and I think there were also 3 storks, and I'm pretty sure there was a tiger named Diego, I don't remember all the details but I remember that one of the stork gets hurt and that Noisette and her team wins.

There's also this story about fairies during a war, we follow the Pink Fairies, who's queen is Marina, a really strong fairy. But one day, the Green Fairies attacks and Marina dies in the battle but is brought back to life by the Pink Fairies and rebellious Green Fairies and they end up defeating the Green Fairies' queen, restoring the peace.

These are just 3 examples, I wrote probably around a little more than a dozen of stories even if I probably read around 7 to my class.

The way I resume them they sound like they're long af but actually, the longest one was the one about the Sport Forest and it was like, an a5 paper sheet long.

We all start somewhere lmao.