Its healthy to have teaching aspirations. Its a funny thing, in the early ranks there is the feeling of "knowing" something about Aikido. But the more time I spend with Aikido, the more I realize the vastness of the Art. My knowledge would be lucky to be considered a damp mark in the bucket, not even enough to be a drop in the bucket; A speck of dampness. (
It's an honor to be asked to teach Aikido. If you have the dream to become a teacher, you should be asked to do so. Drop the notion of one day becoming a teacher and just train with honesty and an open mind. Drop the "wanting" to become a teacher, and become a student. Come to learn without an agenda, then your mind will be open to what is being taught to you.