Possible Clues:

• Being only a beginner, quite harmless, it seems
• One's only starting so there's as yet no harm in one
• Lack of grip shown by beginner?
• New or inexperienced person
• No harm in being just a beginner
• No harm in just starting
• There isn't any harm in anyone so new
• Young nun: what would she know?
• He's still learning - there's no real harm in him
• A beginner or student nun