Well if you have a small amount of money I recomend that you go and buy a tutorial. I personally recoment the Digital tutors tutorial, but also check out this side for good tutorials(I havent checked but there should be some tutorials on this subject)

Best of luck.

Edit: Found this tutorial on the free part of this site, perhaps it can at least give you a little insight.

https://www.simplymaya.com/movie_page...html?tut_id=36