“Is behavior therapy for schizophrenia effective?”

often combined with medication, behavioral therapy, including CBT and DBT, can be helpful. There are psychosocial rehabilitation programs and agencies, such as Office of Vocational Rehabilitation, that can help with part-time volunteer or paid jobs which often helps a person lead a better life.
NAMI, The Mental Health Association and other self-help organizations offer a number of programs. Peer support is a program when people in recovery from mental illness help others not as far along the path.

Schizophrenia is a serious psychiatric disorder. It is characterized by a combination of "positive," "negative," and cognitive symptoms. These symptoms are chronic and usually appear in early adulthood you should see someone.

See this link..
https://www.amenclinics.com/conditions/schizophrenia-and-schizoaffective-disorders/?gclid=Cj0KCQiAweaNBhDEARIsAJ5hwbc4mwfAfkjA6r4v8SesL9spKRcLX8DBQ7b1En_1GCavxLQCAULmy6QaAqvuEALw_wcB
and
https://ajp.psychiatryonline.org/doi/full/10.1176/appi.ajp.163.3.365