Привет Timotey!
I appreciate your need to have me teach you Java, so don't worry I'll help you make it comfortably. I will be glad if you could provide more details if yoy have syllables for Java you want to follow.
Make sure that you will be very happy, when I start working with you, because I can easily do your work according to your requirements, because I have many years of experince in Java and in making Android apps using Java.
Never hesitate to contact me.
Best regards.