It seems to me that in my city there are really not enough yoga teachers. I've been practicing yoga for several years, and I'm sure that I could become a good teacher to help people come to a balance.

This is a big problem because this is the logic that guides most yoga teachers. I believe it's important to be a certified yoga professional who knows all the ins and outs of yoga teaching. I found 2 cheap online yoga teacher training certifications . You can compare options to choose the best and get trained, but in any case, each of them is accredited by the Yoga Alliance.