How can you protect yourself from blackmailers?

Mera aaikh bhai hai (tau ji ka ladka) we live nearby so he got blackmailed with his nude photo and ai generated video i am saying ai generated becoz he said that that is edited so its video of video call so now there is voice note came to ask money now noboady knows about only me and 2 sisters of him and his mother we decided we will tell family at morning .... so sir what can we do plz sir i need help me i saw your yt video i am also a student of 11th