Then you must go to a special massage school to study. There are many professional massage schools now. After the training of professional teachers, you can learn very professional massage techniques.
Of course, you have to pay a certain fee to go to the massage school. Personally, I suggest going directly to a large professional foot massage shop to study. Not only do you not need to pay tuition fees, but some shops even offer paid training.
Moreover, the trained teachers are no worse than those in massage schools. After the training, they can work directly to make money, which is a very good choice.