MutilationWave
IDDQD
You should be able to play a game by playing the game. The game itself should teach you.
Manuals / the Civopedia are important and should not be neglected (I've been playing the 2016 Doom, and there's something similar to Mass Effect's codex that you populate as you go), but they should not be how you learn the game itself.
If that's how you work, that's cool. But I'm not sure that's how most people figure out how a game works. Otherwise the need for tutorials wouldn't have developed into the aspect of gaming that it is (some games have overt tutorials, other games softly on board you by introducing you to mechanics over time.
Off topic, but I was just playing DOOM 2016 a few days ago with my friend. On PlayStation, and I'm terrible at shooters with controllers. Massive auto-aim helps

What do you think of the new one coming out going back to more classic tanky controls?