To the quality creativity of every pencil drawing, there is always a foundation to its process. To make a hyper realistic drawing, certain steps must necessarily be followed.
It is always a necessity to create a scaled/grided paper in which your drawing will be outlined
Sketch out the figures/shape as seen in the picture
Highlight and bring out all the details on the drawing as seen on the reference picture. Make sure to look closely at the reference picture so as to get accurate representation of all what you are outlining.
Having done all these, am certain that the shading process will flow well without any issue.
This is just a step by step tutorial on how to sketch out drawings easily on paper. I trust it is helpful.