pascalPPPP, I can understand your first experience. I take your post as an indictment of the lack of documentation more than what the program does offer. Dorico is built on new and different concepts of how to store and edit music notation. Perhaps it will become more intuitive for mouse users in time.
Sibelius definitely excels in ease of UI. But the way it is structured makes musicians bump into many limitations in editing and display. Dorico is addressing all of these limitations, and it’s very exciting.
An idea for the Dorico team, and/or perhaps helpful users: As a stopgap for proper documentation, perhaps the soundtrack of some tutorial videos could be overdubbed in multiple languages. What is most needed is a first introduction to the interface. How to do exactly what pascalPPPP tried to do.