Yep, I agree with France. HRE tends to be a little difficult with so many enemies.

As for 'creating' your family members I believe that it can only be done by editing the names files then the descr_strat. Even then you will still have the original avatars. Even then you have no control over adopted characters names and any which are born after you start the game. It is quite tricky modding, not for someone who is just starting to mod.