Answer 1

Firstly install Android studio in our system(check hardware and software requirements first).
Start with the basics of user interface i.e XML part and then slowly moved toward java part where you learned actually how to make it functional.
By then way I am also learning Android studio.
Here is some my questions in Android studio.
https://www.sololearn.com/discuss/1331143/?ref=app

https://www.sololearn.com/discuss/1372853/?ref=app