OK, so I finally decided to study and memorize the 12 keys of music and I want to get the right info. Heres where I am confused: Take the key of C for example, sometimes it is listed as (C,D,E,F,etc). Othertimes (C,Dm,Em,F, etc). Is the first just a dmubed down version to make it easier? I dont want to memorize the wrong thing.
Thank you for the quick response guys. Makes sense, Em isnt a note. I think my approach will be to learn the chords and go from there.
for the twelve keys of music, just look at a piano diagram..

i think i'm not getting something here though