Where can I find good tutorials on mobile app interface design in Unity3D?

Question

User interface

Good day to all.
I am interested in the development of interfaces for mobile applications in Unity3D, in particular:
1. The theory of interface design itself (with an emphasis on mobile platforms), taking into account the requirements of platform developers.
2. Stages of designing the design of interfaces (beginning, of course, with drawing on paper or in a prototyping program, and ending with the drawing of all elements in any graphic program).
3. Adding all this stuff to Unity itself.
I'm sure it's all on the net, but I'm having some trouble finding information today - tell me your favorite books/resources on these topics.
Thanks in advance.

Answer 1

only in english, youtube help