It's alot more common than you think. I know alot of daqan celis kids who married their first cousins. 2 of my cousins from my mother's side are married. I told my mom to not even entertain the ideatold her she had to be more creative than that.
Dhaqan Celis doesnt work imo unless you send them before they are teens
Secondly Somalis should stop thinking if they marry their son to a good woman that he Will change nobody can make another person change