Digital Drawing of The Son of Man

Hey dear followers and art critiques, I found this old Design class task from my hard drive, where we had to digitally draw an image, I found this task really intriguing because I love to draw, but I'm not really good at it, so whenever I get a chance to draw something I will happily do it, but I would rather not show others. So this is the first "work" that gets to see the eyes of public. I'm not really happy about it, but it resembles the work a bit so I'm glad on that.

There are no shadows/blending really done and it was one of the first few tries that I have digitally drawn ever so no hard feelings please. Also didn't have a lot of time, so no background, or the brick wall is drawn, which would have made the picture definitely a lot more similar and better looking than this plain grayish background.
I will leave the original picture under it as well.