Simplify the following text for a Grade 6 native English-speaking person.
Original: Chambi initially served as an apprentice in the studio of Max T. Vargas , but after nine years set up his own studio in Sicuani in 1917 , publishing his first postcards in November of that year .
Simplified: Chambi was an apprentice in the studio of Max T. Vargas . After nine years he created his own studio in Sicuani in 1917 .