No, sorry. Leonardo was not the first to do everything in this world.
at the age of 17
Yes
he used a quill to write and carcoal to draw
Yes, Leonardo Da Vinci could write with one hand and draw with the other at the same time.
he took a lot of notes (many of which are today public), but did not publish anything.
To write it for yourself, YOU have to do it.
It is not known who taught Leonardo Da Vinci how to read and write. Though since he spent the first five years of his life with his mother it's likely she taught him or found a teacher who taught him.
I believe somebody has tried to write Leonardo da Vinci and failed.
About 1587.
at the age of 17
No.
Leonardo da Vinci wrote most of his personal notes in mirror writing. Most of his notebooks were written in mirror writing.
he used a quill to write and carcoal to draw
Yes
Yes, Leonardo Da Vinci could write with one hand and draw with the other at the same time.
he took a lot of notes (many of which are today public), but did not publish anything.
He made sketches and wrote comments. He never made the actual constructions.,