What are you even talking about? The game saves every time you submit a photo. If you don't submit there is no loss of anything.
The only thing you lose leaving the game is your temp photos. And you can save those by submitting them either to your gallery or Monpedia.
As for the stealth, perhaps reading the tutorials found in game would be useful for you as it explains just about everything you need to get started on how systems and mechanics work.