Saan magandang i-enroll ng jhs yung kapatid ko na matalino pero medyo behind socially?

Problem/goal: I want to find a high school environment where my younger brother can feel comfortable, relate to his classmates, and not be at risk of bullying.

Context:
My brother is an incoming high school student, but he’s a bit of a late bloomer. He acts more childish than other kids his age, and it’s really noticeable when you compare him to his peers. Sometimes he whines and behaves more like a younger child (around 5 years old in behavior).

We’re not sure yet if he’s on the autism spectrum he still needs to go back for a proper check-up in the future.

He’s actually very smart. He speaks English well (his first language) and understands Tagalog clearly. Academically and intellectually, I’d say he’s even ahead of some kids older than him.

He’ll be in jhs next yr and we’re worried about choosing the wrong environment. Our main concern is putting him in a public junior high school where he might struggle socially or become a target for bullying because of his behavior. We want him to be in a place where he can relate to other students, feel accepted, and still grow at his own pace.

He seems to fit better with English-speaking kids, Any advice on what type of school here in Quezon City or environment would be best for him?