Unfortunately, family members are only eligible if you are working in a NOC A, B or 0 job. See point under spouse of skilled worker. So a spouse is not eligible for an open work permit. Your family members can apply for visitor visas to visit you. They need to show funds, ties to home country and travel history.
I am not sure if children are eligible to study under this stream as a spouse is not eligible because it is not a NOC A, B or 0 job. Contact IRCC to confirm.