Have you ever heard the term “poker face”?
In poker, you don’t learn it in one day, it comes with time, discipline, and a lot of situations where your heart is racing but your face stays calm (like “I’m doing great 
”)
That’s why I believe that lying to a real poker player in everyday life is usually a bad idea. They can notice the things most people ignore (I would call them micro-movements).
So here’s the real question: What’s the first thing you look at when trying to read a player?