How to get started with Android Studio?

Question

android studio

I just started getting to know the studio. In theory, in the design window on the phone screen, "Hello world" should be displayed, but as you can see, this is not so. Also, when I drag buttons or other View elements there, they are not displayed. Tell me what the problem is, how to use it, and if anyone can give a link to suitable material for mastering and creating practical applications (such as books or a cycle of video tutorials), I would be very grateful.

Answer 1

Don Griffiths, David Griffiths - " Head First. Android Programming "

Answer 2

https://startandroid.ru/ru - but when studying, be prepared to come across outdated material, not only on this site, but in general everywhere