Author to write a story in French

I want to talk about the power of kindness from a story that really touched me. The story must be written by a French native author. No rush for me. I need the help of an experienced book writer to write a story in French. I haven't written anything yet, I have all my ideas in my head. I have a story in my head. I can send the outline.

I have no idea of the exact number of pages. Basically, I had thought 100 pages but your advice is welcome.