I think yoga instructor is better, because if you want to learn photography, your future investment is a big problem, because it takes a lot of money and energy to estimate equipment, equipment, places, your reputation and so on. However, if you are interested in learning yoga instructor, you can take a test. If you don't open a gym, you can take a substitute class in the gym. In addition to earning money, you can exercise yourself first, keep fit and keep healthy. Moreover, a yoga instructor doesn't have to run around like a photographer. It's easy and you are thin, so I don't think a photographer is suitable for you. Besides, learning something is not something you need to learn in the big situation, but something you like. You can learn what you are interested in, and you need everything you learn. I think a yoga instructor is more suitable for you according to your own conditions, but it depends on your personal interests. Think twice before you do anything, and you must not be too blind! Yoga instructors don't need to invest unless they open a museum. Only three or four thousand dollars is enough for study! I am in Jinan. This is the price for a yoga instructor in Jinan to study!