Alvin Ho, Allergic to Girls, School, and Other Scary Things by Lenore Look, illustrated by LeUyen Pham

From chapters.ca:
Alvin Ho is an Asian American second grader who is afraid of everything — elevators, tunnels, girls, and, most of all, school. He’s so afraid of school that, while he’s there, he never, ever, says a word. But at home he’s a very loud superhero named Firecracker Man, a brother to Calvin and Anibelly, and a gentleman- in- training, so he can be just like his dad.