There are two ways to learn Sichuan cuisine techniques. One is to work as an apprentice in a hotel restaurant, and the other is to go to a specialized chef school to learn from professional teachers.
If you can't find a master who sincerely teaches you techniques, it is recommended that you go to school to learn. The reason is very simple. The techniques you learn are very systematic. You start from the basics and learn the methods of major cuisines every day. Practice with specialized ingredients and you will naturally learn quickly. After graduation, you can work in a hotel restaurant. You have a good eye and can know all kinds of dishes at a glance.