Complex sentence: By then, he had already been involved in experimental theatre for nearly four years and after impressing the stage, he also made his acting debut in the year 2006 with the films "Mera Dil Leke Dekho" and "Offshore".
Split into simpler sentences: By then, he had already been involved in experimental theatre for nearly four years. He also made his film industry debut in the year 2006 with the movies "Mera Dil Leke Dekho" and "Offshore".