How can I cut my own hair?

I have always had my mom cut my hair, but its always been boring, and its just been a trim. My hair is currently just, long and straight.

But I want a totally different hairstyle…like this http://www.myhaircuts.com/longhaircuts13.shtml

But I have no idea how to cut it..! And going to a barber costs too much… Plus…I have no idea if it will look good on me…. (Im part asian, with straight, long, thin, black/brown hair)