The main spring is safe for a novice. They do open water training there. A drift dive from devils ear to the main spring is easy allso, although the river part of the drift the viz can be low because of the tannins and tubity in the river but still ok for a beginner comfortable with that. The ball room below the main spring they allow OW but it is an overhead enviroment and should not be done by beginners and dive lights are needed. I would recomend AOW and or Cavern cert to go into the ball room since it is overhead. Devils Ear allows OW but no lights allowed to keep divers out of the cave sytem unless they are cave certified.