You can become a yoga teacher in Rishikesh very easily, if you learn from one of the renowned yoga schools there. The best schools are certified by Yoga Alliance. It is one of the best qualifications that you can flaunt. After having completed the yoga course, you will be in a position to teach as an intern or assistant, at the very same school where you did yoga TTC. Apart from that, once you get sufficient experience as an assistant, you can look for independent teaching jobs. Yoga is a culture in Rishikesh. Wherever you look, you will find some teaching opportunity or the other.