According to historical documents, Shakespeare basically went off the grid right after his twins baptism. No one knows what he did during the time, but there are speculation that he might have worked as a schoolteacher, studied law, or even traveled across Europe.
It's also said that Shakespeare fled his hometown after he poached a deer from a local politicians estate.
Shakespeare's first plays, that are thought to be written around 1592, all focused on the three main dramatic genres: tragedy, comedy, and history. He was also thought to be involved with multiple theater companies during all of his early play writings.
In 1594 he began and finished writing and acting his play the Lord Chamberlain's Men. He partnered with different types of men and programs to establish the Globe Theater in 1599.
While London's theaters were closed due to a plague outbreak(1593), Shakespeare published his first narrative poem--"Venus and Adonis". It was dedicated to his close friend Henry Wriothesley.
In 1609, he had printed and good amount of poems that all addressed the themes of love, truth, and beauty. Although he published them, they got less love and support because of the "explicit sexual references and dark emotion in characters".