After reading your other posts, I see you are a young boy.
Producing sperm will happen when it happens. There is no specific age that a male's body suddenly produces sperm. It varies from person to person.
Since you are growing hair in new places, I would guess it will happen in the next few months. But as I said, each person is different.
Your profile lists your sex as female.
Your question is lacking in details, making it somewhat confusing.