Hey Rebecca...congrats on getting the fever! ;-D To learn a surface 360, use at least a 75' rope to stay out of the white wash, slow the boat down significantly and start with 180's from there. Put more weight on your front foot and slide the rear foot forward; move the handle from your front hip to the rear in the process. To progress to 360, from fakie position you just accomplished with 180, pull the handle (with your "new" leading hand) to the small of your back with palm facing out; reach around & grab it with your trailing hand to finish the rotation! Take it to the next level by doing the whole rotation in one motion. After learning at slower speeds, start doing them outside the wake by taking an aggressive cut out, let off & do the same rotation.
Good luck & let us know how it goes!