Mastering yoga takes 2-3 years for an average individual who is in a good enough shape, while those who are in excellent shape and trained in related disciplines, such as dance, can pick up all the things they need to know within a few months.
In addition to knowing the theory of yoga and being able to do the crow pose, the best yoga instructors live their yoga principles outside the studio as well.
It is recommended to try out as many styles of yoga as possible and pick the one that best suits your needs and abilities.
Having found a style, the next thing on your journey is to find the right teacher, from whom you can learn what really interests you. Keep in mind that practically anyone who pays for a certification ends up a certified yoga instructor, but not everyone succeeds.
Being business savvy and knowing how to attract and keep clients at your studio will make the difference between success and failure.