How to become Yoga Teacher?
Do your practice as learnt from your Guru or teacher. Deepen it with regular practice. People will see the change in you. When people notice change in you, they will ask about it. Share with them. Share with your family and friends what you are doing. Let them know that you are learning and sharing to the best of your knowledge. Go with the understanding that there is so much to explore within. Learn and share to best of your capability. With the grace of Guru, things will shape eventually in sync with your evolutionary growth.