[ngokevin]

What pitfalls did you run into? From what I heard, the learner often expects the other person to become their personal on-demand language teacher. And then patience burns out quickly. I think it works if the learner is committed to self-study but only relies on others for a bit of reinforcement, clarification, and practice.

[golem14]

I don't think about grammar when talking, so to explain when to say "kein" vs "nicht" took a few moments .

Translating "oder" or "eben" is surprisingly difficult, just to name a few examples.