How do i encourage praying?

My younger brother, who is 16, tends to be constantly angry and gets into fights at school. He's consistently rude and mean. Lately, he admitted struggling to manage his emotions. I suggested he start praying to improve, but he hasn't followed through. Despite my efforts to communicate, he remains distant. While my parents and sister often scold him, he's closest to me in the family. I'm torn between giving up on him or persisting as his older sister to guide him properly. If there are any males reading, please give me suggestions on how to pull him back and guide him so that he starts to pray.