No Music class......but know to play the instrument

Right from my small age i haven't gone for MUSIC CLASSES(any),but i know to play CASIO to certain extent,till now i have practiced only with one hand& not two(i meant the chords).as you can see in above picture their are two different color keys(white & black).the white keys are used for normal sound,black one's are used for higher notes(while writing we write it as '#'which means sharp).till now i know to see the alphabetical notes & playbut not the one with musical sign.
for eg: the alphabetical notes for first line of our national anthem is
CDEE EEE EEE DEF(jana gana mana......).
the order of keys are like this
CDEFGAB(NOTE:E & B does not have the sharp notes(i.e black keys)).see what the keys stand for?

C-SA D-RE E-GA F-MA G-PA A-DA & B-NE.
if i get chance to go for music class i would definetly go.