Hi There,
I would like to advice you to make a small plan for your stay .. because there are really a lot of things to see and the only way to see as much as possible is to make a good plan ... if i'was you i would try to stay in the Center of Tunisia ( Sousse, Monastir ) then you can move easily between the north and the south ... enjoy the sun and the sea ... take good care .. watch yourself ( good people and bad people are everywhere ) for everything else let me tel you that you made the right choice
Cheers
Makrem