Formerly, he wrote for profit! He was not a good actor, and so turned to writing plays, other than performing in them, for his living.
His classical education, was to prove crucial in his writing as he easily portrayed all the classical Greek and Roman characters in his plays with equal brevity.
Shakespeares, moves effortlessly through early, to more finer written, eventually ending at precise, clinical expressive work, each play bringing prehaps a new slant into it from the previous one, making him the one playwright, out of all the ones in London, ( at one time estimated at more than three hundred), that the majority of London's theatregoers would prefer to go and watch.
A teacher saw he had potential then introduced him to plays and poems. That's when he started writing the plays.