What are the tips for proper makeup application?

I am sixteen year old girl and now I am trying to learn make up techniques. As applying a lip gloss is not a problem for me, but the real problem starts when it is the time for eye liner. No matter how much I try to shape the liner, it always ends up looking sloppy and really large, giving it the dramatic effect. I want to look sexy, subtle and elegant with make-up.Please help…