Initial clarification: I am talking about a very informal teaching style. Teaching in a formal environment without qualification would be irresponsible.
A bit of context. I offered free German lessons to two close friends of mine because of two reasons: to practice my teaching skills and to deepen my knowledge of the language. It is said, that when you can teach a subject, you have to previously understand it well enough. And when that is not completely the case, teaching is very helpful in solidifying knowledge. As an intermediate German learner, I find experimenting with this idea quite attractive.
I just wanted to know your opinions. Will teaching with my current knowledge be effective? How much does one need to know about something to start teaching it at the basic level? I have this theory, that for example, to teach how to add, you don't need to know calculus: you just need to know how to add.
Let me know how you think it will turn out!