Instructions for the 21st Century

This is my first sort-of instruction manual that I've ever written, so try to stick with me here. I'm pretty sure that I'll fail at it, but I guess not every story is a masterpiece. Btw, when I say instruction manual, I don't mean it'll tell you how to build a couch or some shelves. This will be more of a list of things that everybody should know if they are growing up in the 21st century. Mostly a bunch of things that adults may not understand. The whole point of this story is: if your parents or grandparents don't know the things that you believe are basic necessities of life, you can show them the chapter that is about said thing and hopefully it will stop you from going on a 14,000 word rant which would probably end with you ripping off the head of your dear relatives. I hope this helps.