A charming and beautiful story of a little girl with brilliance and special powers. It reads like a gentle fairytale narrative, simple and brief and summarized. Your character is taught the best use of her exceptional gifts, and is promised not only a mentor but also a young friend. This story has incredible potential to be made into a series, an epic fantasy, even a Disney movie.
You have some simple grammar errors which could be helped if you run it through a program such as Grammarly. I would like to offer suggestions on the major points involved in turning this into a full fledged story…
First, one must set up the basic ingredients of good literature: goals, stakes and obstacles. The main character needs a development arc, which includes an internal conflict and an external conflict which she grows through and learns from. Tension is brought by raising the stakes and creating obstacles to the goals. There should be an antagonist of some sort, a character whose goals compete with Brenda’s and create conflict between them.
Then, of course, there’s showing versus telling and putting us into the main character’s head. We find it to be a more engaging read when we feel what she feels, know what she knows, and experience the things which happen to her in the limited sense, rather than having everything shared by a storytelling narrator in the style of a fairytale. This is a large and complicated subject, and you could learn more about it by reading a few articles written by
Max Griffin 🏳️🌈 
or submitting your item to him for a review.
I love your premise, and this is a very sweet story, but as it is it feels like a rough sketch of something much bigger, a fleeting capture of ideas for further exploration and development.