Sasha, like many gender-nonconforming people, wants to be referred to with the pronoun they. It might feel awkward at first, but you'll get used to it."
-- Slater (Pronouns paragraph 8)

Importance: This is one of several places in which the author, Dashka Slater, directly addresses the reader. In this case, Slater is explaining the use of the pronoun used to refer to Sasha, and assuring the reader that it will become clearer after reading farther.

It was like a gigantic menu, with columns and columns of choices."
-- Narrator (Genderqueer paragraph 7)

Importance: Slater is referring to the information Sasha comes up with during their research into genderqueer. There were several basic categories to describe how a person felt about themselves, and who attracted them physically and emotionally. And, as this statement indicates, there were dozens of options within each category to be more specific.

But the person who lived in this new room still had a boy's name - Luke...
-- Narrator (Becoming Sasha paragraph 1)