If you've never used any hardware, how do you get to know what everything does? To be honest, it's easy, some things you'll use maybe once or twice per session, others you'll use all the time, but you will use everything fairly regularly.
But this is the video you need, and Crossfader will teach you the majority of controls so you can have a play and learn how to learn.
You also have to remember, there's pretty much two of everything, so really, if you learn everything on one side, then it's really just the same for the other side.
