What is the coming of age theme through chapter 1- 6

In the novel’s first few chapters, the reader only gets hints of the dark themes the author will pursue through the rest of the book. Although she begins by mentioning Jem’s broken arm and she presents some of the challenges that a small Southern town presented in the 1930s, the focus is on the Finch family. Harper Lee clearly establishes Scout as the protagonist through using her as the first-person narrator, although as the novel develops the emphasis shifts so that Atticus is central. Scout and Jem have a particularly close relationship because there are only two of them, their father works a lot, and their mother is dead. In these first six chapters, however, Scout presents the distance that was growing between them, as Jem moves closer to adolescence while Scout largely remains a child.
The relationship between the siblings is also complicated by their friendship with Dill, a charming but undisciplined boy from another town who spends summers in Maycomb with his aunt. The realization of her female status is brought home to Scout on several occasions. Although she still primarily sticks with her fierce tomboy identity, she and Dill get engaged. Because of their upbringing in a home where freedom of expression is encouraged, the precocious girl seems unaware that to other children and most adults, she comes across as a know-it-all. Scout seems to have no female friends, and her relationships with boys include a fair amount of physical violence, which in Walter’s case leads to friendship.
The children’s youthful status is established in part through their behavior toward the Radleys. The three of them make a game out of mocking the Radleys, dare each other to approach their house, and generally disrespect their neighbors. Atticus calls them out for their behavior. They also begin to receive communications from Arthur (Boo) Radley, setting the stage for their eventual meeting. When Jem takes a dare too far, he nearly gets shot and he and Dill lie to Atticus; this widens the gulf between father and son—as Jem says he no longer wants to become a lawyer—but brings Dill and Jem closer.