The beginning point is different for everybody. But the question is always directed towards one self, and having the flavor of searching for One’s Own Existence beyond the form of body and thought. The strength of which one is wholeheartedly committed to see it to the end, through and through, determines pace.
“Who am I in spite of thought?”
“The Source of All is present at all times? I will sit here every chance I get and just look then.”
“What if I just accept everything that rises in the moment as pre-ordained?”
“Who am I in spite of what is perceived through the various senses?”
“Is there any part of me that is unchanging, consistent, and unaffected by phenomenon?”
“Can I die without harming the body? Yet remain alert?”
With great perseverance and devotion; strive to see the inquiry all the way to the end.