I don't know if you are a beginner or have some experience. If you are a beginner, I suggest you take a look at the weight-loss aerobics in Yi Haiyan, learn some basic knowledge first, and then find some foreign aerobics tutorials, many of which are aimed at leg training. Personal experience, there is not much thunder, you can look for it on the electric donkey, it is very comprehensive! After you find it, you can copy the address with Thunder, which is much faster, or you can usually find videos on websites such as Youku and Tudou by writing down your name!

/topics/250255/

This is an address on the electric donkey. At present, it is the most comprehensive aerobics I have found. The difficulty is clearly explained. I hope it helps you!