novice tf2 sniper reference guide

Hello! Hallo! Bonjour! Hola! Hej! Здравствуйте, if you want to be a language connoisseur! My name is Koro-Sensei (props to you if you know where it's from :P) and if my name is different for some time in the future don't be surprised :P! I'm here to give tips/advice to newer/novice Team Fortress...