Yoga Strength

Question:

I’ve practised asthanga vinyasa for a while, and are now playing with the thought of doing a yoga teaching education in India. I know very little about yoga theory and the different types of yoga, and in my serarch of finding the right place for me to do that education I would very much like to get a overview of the different types of yoga. How many types of yoga is there? What is the main difference between them? What is the diffenence between hata yoga and asthanga yoga? I would appreciate if someone would give me a short theoretical introduction and an overwiew of the different kinds of yoga. I also appreciate any advice for relevant litterature. My best Ca