Then start writing your own application. When you have questions read the django documentantion. The django docs are the best documentantion I've ever seen, they are better than most books about django and should answer all your questions. The docs are so good I recommend reading them from start to finish - i.e download this off line version of the docs: https://media.readthedocs.org/pdf/django/1.11.x/django.pdf
and read it from cover to cover. You will not regret it.
Then start writing your own application. When you have questions read the django documentantion. The django docs are the best documentantion I've ever seen, they are better than most books about django and should answer all your questions. The docs are so good I recommend reading them from start to finish - i.e download this off line version of the docs: https://media.readthedocs.org/pdf/django/1.11.x/django.pdf
and read it from cover to cover. You will not regret it.