Tutorials for WHAT? How you use Illustrators brushes is up to you. I can't teach people how to draw people, that's something that everyone does differently. And exactly how does one teach someone how to draw a person? I suggest learning facial structure and expression.
I have tutorials in my gallery if you'd like to use them.
All sillyness aside, tis quite the exceptional picture of the man, you caught that look he gives quite well.
I'm an avid fan of Keanu and i really like the expression
-Blade Genexis
I have tutorials in my gallery if you'd like to use them.