It is not known when he started. We can guess that he started writing plays after he moved to London and became involved in the theatre scene, sometime in his lost years 1585-1592. He might possibly have started writing poetry before he left Stratford.
Put where he started his writing...
We don't know what Shakespeare wrote at the start of his writing career. We first hear of him as a writer after he had written some of his plays.
Nobody knows exactly when Shakespeare started writing, but we know it must have been before 1592. Shakespeare was a kid from a middle-class country family, who had a grammar-school (high school) education.
No one "chooses" such a profession, it chooses them. We can only speculate on what induced Shakespeare to start writing. Perhaps he started as an actor and thought that writing plays would be a lucrative and useful sideline.
We presume that Shakespeare did not start writing plays until after he moved to London to make a living in the entertainment world.
Shakespeare wrote in poetry, even when he was writing plays.
Before Shakespeare began writing plays he was an actor.
Nothing. Shakespeare started writing before Marlowe died.
Writing was not Shakespeare's only career, and probably not his first.
Most of Shakespeare's writing is in English. There's also some French.
A quill pen was the writing implement of choice in Shakespeare's day.
Because James Henry insipred him to do acting and writing. James Henry was his Idol.