If you have any questions, reports, suggestions, or requests about Live2D, please send them to this community.
※We cannot guarantee statements or answers from Live2D staff. Thank you for your understanding in advance.
 
Live2D Cubism
Cubism Products and Downloads
Cubism product manuals and tutorials
Cubism Editor Manual    Cubism Editor Tutorial    Cubism SDK Manual    Cubism SDK Tutorial

Live2D user has created a tutorial video(unoffilcial) in English. SEE ALSO.
Thank you, brian_tsui!
[Live2D Tutorial 2020] Introduction to Tools and Technical Concepts