nothin's more easy on the guitar than strumming. hear a simple song. and try to figure out how it's done the d u d method is not a very precise method of telling the strumming pattern.
just try to do it, it will sound nonsense at first, because ur hand is not used to the movement. and slowly u'll get used to it
and mind u start with the basic chords first, c f g etc or the d a e , chords sound cool the d a and e chords were used on the song roobaroo- rang de basanti, love it.