Here's my gray scale. I feel I could refine it more but don't want to put too much into it. I don't want to make it into a big thing. I want to do more of these also.

Hi, here is my attempt. I have some problems with shades transition, thus i think my picture looks too contast (nontheless i tried hard using method described in the video). I have a clue that i use too soft pressure with my pen when doing these gradual shade transitions. Any tips are appreciated.