What new things does Scout learn from Jem’s and Scout’s first visit to First Purchase church about how the black people in the community live?

During her visit to the church, Scout is surprised to hear Calpurnia speak in the same black dialect as the others, because at home, Calpurnia always speaks proper English. Inside the church, everything is much simpler than in the church she is used to, and there are no hymnbooks. Reverend Sykes announces that the collection taken up today will go to Helen, the wife of Tom Robinson. Calpurnia's son Zeebo, the town's trash collector, leads the congregation in hymns, singing each line and having the group repeat it back to him. Reverend Sykes gives a sermon, which seems similar to the sermons Scout is used to, except that he makes examples of particular people in the congregation to illustrate his points.