It was nice to read your story, it has a beautiful message. And it is written fluently. Some details to my consideration that could be improved.
As very specific details:

preparatory class and class 2.

And the break of the narrative time, it is a story with a very broad theme, which you are condensing. In narrative everything is precise. It's a crystal goldsmith. Every part is there, because otherwise the structure collapses.
Don't stop writing. Welcome to the community.