4th edition of D&D is simpler than most to learn for a new player. But its new so it cost up the yingyang. If your just looking for some playing of the roll, not so much rolling dice and skills etc like Khaine said just set up some 40k setings and buy an inquisitor blister.
"A true king is never alone, his will is equal to the will of all of his followers."
-Alexander the Great, kind of