Forgive my responding in English.
The team is constantly adding new documentation, but needs guidance from users on what they find confusing. So, please say exactly what sort of tutorials you are looking for. For example, if you were to create tutorials yourself, what type of survey would you want to create and demonstrate; what specific steps would you want to show; and what lessons would you want students to learn from the tutorial.
By the way, I have added a Quick Start Tutorial to Expression Manager
here.