FROM THIS CAN WE LEARN ENTIRE PYTHON OR JUST BASICS

Answer 1

Basics, python is a powerful and extensive language and cannot be learnt using a simple phone app

Answer 2

also, I think most of your learning of Python will not and should not be from a course. It will come from writing code

Answer 3

I doubt this will put you anywhere near full coverage as "entire Python" e.g. will include experience with application of your skills in different contexts, possibly interacting with other languages, and tracking the developments in the language itself