It definitely makes sense, but could sound a bit more natural! Try this: 노래방이라는 게 무슨 뜻인지 잘 모르겠어요. 좀 도와주시면 안될까요? For the second sentence there are multiple ways to phrase it depending on how you want the tone to feel. The one I wrote is more similar to “would you mind helping a bit?” You can also shorten “이라는” to “이란,” but I just wrote it the way I would say it out loud. Hope this helps!