I think it is. Usually, when it's labeled as a true story, there's some factual basis. But keep in mind that in presenting it as a story, some details might be emphasized or modified for better storytelling.
Yes, it is. The story is said to be based on real-life experiences related to schizophrenia, offering an authentic perspective.
Well, it claims to be true. But sometimes, even if based on real events, there could be some creative liberties taken for narrative purposes. However, the core elements are likely rooted in reality.