Where can i get technical information on how the internals of Django works?
I doubt there are technical manuals on the subject. It might take a bit of digging, but the API documentation and the source code are your best bets for reliable, up-to-date information.
Where can i get the technical manuals/details of how django internals work, i.e. i would like to know when a request comes in from a client;

which django function receives it? 
what middleware get called? 
how is the request object created? and what class/function creates it?
What function maps the request to the necessary view? 
How does your code/view get called

?
etc...
Paul.G