Sry, not trolling. I don't think anyone else is.
Analogy: Hey kids, we all gonna parle français.
Teacher to be asks what do I need to know?
Sure, many ppl here know enough, maybe some even know how to teach what they know. But it took anyone like that more than a few hours to learn. Either the subject or how to teach.
A language teacher ought to be fluent.
a7