Before you post your request, please check the EP7+ sections for a newly updated mod. Please also check the Compatibility lists for links to mods that works with either FreeTime and/or Apartment Life.
And no, there is no possible way to create just teens by themselves in CAS. The game is hardwired to prevent players from creating families of just babies or toddlers or children or even teens. An adult has to be made for the family or you won't be able to. BUT, there is a workaround. Create an adult if you want one teen to live on their own. Then move that adult into a new home and then use one of the many mods available to age the adult down to teen. Then you got a teen living on their own.
More Family Members & Pets 12 - AL already exist.
Oh, please post your latest EP.