Startandroid, Brian Hardy, or official tutorials?

Question

Android

Mastered the basics of Java from Schildt's Beginner's Guide. I looked at a couple of lessons from StartAndroid , noticed that the author takes the original tutorials, and seems to explain in Russian.
The question, in short, is this: Am I missing something if I watch these lessons?
Why am I pestering the inhabitants of the lamp toaster instead of looking for myself? Time is only a month and a half, I want to have time to store structured knowledge in my head with understanding before the army, so that they do not crumble there. Therefore, who knows - advise where to start Android Dev so as not to end badly =)
Actually, the choice is from:
1. Brian Hardy, Bill Phillips - Android Programming (For Professionals) - 2014 (and in general, is it suitable for beginners? )
2. Startandroid.ru channel on YouTube / Lessons from the site (Doubts about the usefulness and quality of information).
3. Official tutorials (I can speak English, but a little, so far I don’t want to delay it with practice, because I read in this language for longer).
4. (I almost forgot) Alexander Klimov 's courses (learn android playfully). I'm ready to pay for access to the second part (and the author doesn't ask for much), if it's worth it.
Sorry for any confusion, and thanks in advance for your replies.

Answer 1

+1 for Hardy, what's stopping you from taking the book with you into the army?