We have no documentation of Shakespeare's personal life, so it is impossible to tell 1) when he became a writer, and 2) if he changed at all whenever that happened.
William Shakespeare became a legendary writer.
No he wanted to be a clown
There are many debates over William Shakespeare. There are people who theorize that William Shakespeare, was not actually William Shakespeare. These people believe that William Shakespeare was a noble of high birth, who was using the name William Shakespeare to publish writing. There's also the belief that William Shakespeare was actually several different people writing under the name of William Shakespeare. Ultimately, there's no hard evidence to suggest that William Shakespeare was anyone other than William Shakespeare. So the answer is "YES, William Shakespeare was a real writer."
William Shakespeare
William Shakespeare is the most important writer in the history of writing plays.
William Shakespeare
William Shakespeare
William Shakespeare was the author
No.
William Shakespeare
Notably, there is one writer named William: William Shakespeare. Clearly, there are hundreds of other writers named William as well.
Please, please tell me you're not serious. Just in case, his name was William Shakespeare. Just some bloke from the 16th/17th century.