Dude, many of us learned how to roll pot by buying a big can of tobacco, and making ourselves roll it all up. (Afterwards, you'd figured it out by then!) Of course, many people never learn to roll, which is why I got high for free so often once I'd figured it out. And there is no correct way. The correct way is whatever works. (Now that the cigarette tax has skyrocketed, I can even roll tobacco by hand with a filter!
Necessity is the mother of invention. And many kids who smoke don't even have to figure out how to roll tobacco, as they manage to get tailor-mades.