The Secret of Facebook security...

The secret of Facebook privacy is to not post things you want hide from others, don't post pictures that you don't want everyone to see, and don't post information you do not want to be publicly viewable. 

That makes it so easy.  If you are worried about keeping things from one group and only showing others you might be living multiple lives for different people. Not healthy. 

Remember Facebook is an activity, not a lifestyle. 

Try again and drive it home

Iron sharpens iron, but also consider hammer on thumb brings focus to nail.

Mistakes and errors can happen (your new sore thumb), but that setback can bring new focus to the thing you are aiming for (the nail).

Try again and drive it home.