Complex sentence: He took to journalism, moving to Sydney where he taught English at Cleveland Street Intermediate High School until 1922 when he joined the staff at Smith's Weekly, where he was introduced to the circle that included Sydney Ure Smith and Bertram Stevens.
Split into simpler sentences: He took to journalism, moving to Sydney where he taught English at Cleveland Street Intermediate High School until 1922 when he joined the staff at Smith's Weekly. There he was introduced to the circle that included Sydney Ure Smith and Bertram Stevens.