Being an actor is easy, right? Memorise a few lines (that’s why we learned spelling and dictation back in school!), show up on set, then frown/smirk/grin while delivering your dialogue. At least, that’s what Joey Tribbiani in F.R.I.E.N.D.S taught us. Then go home (or back to your trailer), Instagram some pics, and let the money roll in! Easy peasy. That’s why so many people harbour…