How to cook eggs like a pro?

For years I've tried to learn how to cook eggs like real people. I have done everything. Yet, somehow when I go to work the line cook can make the most perfect omelets. I bust two eggs, I add a little bit of milk, but nothing turns out fluffy and big. My eggs are always kind of flat and it is not that amazing tasting. I don't know what the secret is, and maybe I'm just somehow an imbecile with eggs.