What is your problem with 1) using libraries, and 2) listening to the help people have given you?
All the hard interfacing work was done for you by the folks who developed the libraries.
You like to cite program examples for the ultrasonic sensor as examples of 'NO LIBRARIES'. Go back and look at those programs. See the Serial.**** statements? What do you think is going on there?
You say you have done your research, but you have not tried to understand ANY of what you have seen or been told.
Nobody here can help you until you are willing to work at understanding what is beeing presented to you.
Like it says in the doc:
MISO: Master In Slave Out (microcontroller is the Master, peripheral is the Slave
MOSI: Master out Slave In
and so on, and so on, and...