Where can I get practical lessons on creating 2D games on the unity5 engine for android?

Question

C++ / C#

Preferably in Russian, but eng is also possible

Answer 1

As already said, there is a lot of good material on the Unity site itself.
For example, here is a tutorial on creating a 2D Roguelike, where they create a game from scratch, test it on a PC, and add mobile controls at the very end.

Answer 2

Directly on the Unity website and take it. There are a lot of good tutorials out there.