Hey i've been playin for a bout a month now,and i know the basic note names and such and the whole step and half step,and the major 3's and minor 3's and stuff,but i just can't get scales into my head like what does it mean to play a song in the key of g or e or something,does that mean it's the root of it or what,i really need help with all this stuff like the circle of fiths.