Hello! I do hair using my mouse and Photoshop 7 brushes! I learned from various tutorials that really helped me out! Go to these for the best results 
 http://www.creativedust.com/tutorials.htm
  http://www.antjesgraphics.com/AGTut.html 
  These really helped me to understand what I was doing wrong.... Good luck! Once you start, don't give up. You just have to keep trying and you will get it!