Rainbow Six Siege for Beginners: A Primer by Emaaz

First and foremost, the only actually useful thing is learning.
The maps, the Operators and their gadgets, the mechanics of the game are all things you can master only through hours and hours of practice, not only on the battlefield (no pun intended) but also during your “dead time”. Got ten minutes before a class or dinner? Why not watch an R6S video on YouTube to entertain yourself (there are plenty of good YouTubers playing Siege daily: MacieJay, Serenity17, Skittlz, and NarcolepticNugget are just the most famous ones) or read a couple articles about tips for improving your gameplay? (gotcha here ;] )