In Chapter Sixteen, what does Trey tell Bri about her song On the Come Up and what he thinks about her pursuing a career in rap?

In Chapter Sixteen, Trey tells Bri he thinks her song On the Come Up has some great lines, but that people are going to take her song at face value and she is rapping about things she has no clue about. Trey also tells Bri that she should be focused on school, and that even if her song becomes popular, that is no guarantee she will become rich all of a sudden.