It's hard to give advice when you don't what your eyes look like from the beginning
If you already have a crease on your eyelid (wich most people do, just not as deep as on asians) try to make that more visible. Make the part where the crease goes in darker and the part thats more out lighter. How much is up to you ^^ Don't use to much mascara either. it takes some of the effect away. (But use some.)
And I'm not any good at explaining -_-