Answer:
1. The Narrator is his Doodle's brother as he is learning and introducing doodle, he was using the word "Daddy" to refer to their dad, "I" to name himself and that he is conflicted with Doodle's disability, and in Doodle's early time, the narrator is disappointed. Meanwhile, Doodle is struggling with life and is unable to be like other boys his age and he is keeping up.
2. “They named him William Armstrong, which was like tying a big tail on a small kite. Such a name sounds good only on a tombstone.”
This is a simile in which William Armstrong is matched to a large tail. The simile is highlighted with by using the word "like" to emphasize the simile.
:)