I'm not trans or nonbinary, but I'm pan. I really identified with the constriction of the binary when reading this and considering the protagonist. I appreciated the realness the book provided with so many what ifs and anxiety as well as the happy moments. Also, the book was funny! It balanced the sobering and plain sad/angry moments with some very funny ones! 

One thing I struggled with was the name of the protagonist. It bothered me that once the dead name was shirked by the protagonist, other characters would consistently dead name them. To be fair, it was shown in a very real way, mainly used by parents of the protagonist who were learning, but still. Same with the use of particular pronouns. There was a lot of floundering with them which seemed annoying to me because the protagonist claims their name and pronouns at a very particular point in the story and the name and pronouns are not used consistently even after they expressly asked for them. 

Eventually it all worked our as the protagonist identified with both male and female pronouns, but I was annoyed that when they asked for she/her pronouns, it was often met with "he, well now, she". 

Otherwise I truly did enjoy the book!