I'm learning Japanese, but I'm still very early on in my education (Rosetta Stone, some books and a Japanese-speaking friend). I'm pretty sure I'm grasping the basic concepts okay, but I'm having issues when hearing other people speak the language. Specifically, right now, hearing the "ん" sound.
When hearing a word like おんなのこ spoken, how do I know this word is written おんなのこ and not おなのこ? To me, the pronunciation is extremely similar.
Is there a rule or any tips that will help me discern when I am hearing "んな" ("nna") as opposed to "な" ("na")? (Also "んの" instead of simply "の", you know what I mean.)