Simplify the following text for a Grade 7 native English-speaking person.
Original: Beginning as a chorister at the collegial church of Abbeville , then at the cathedral of Amiens , where he pursued his music studies , Le Sueur was named chorus master at the cathedral of SÃ es .
Simplified: He started his musical training by singing in the choir at the church of Abbeville , then at the cathedral of Amiens . Le Sueur became chorus master at the cathedral of SÃ es .