Take courage, Les : what seems daunting (even impossible) at first becomes second nature once you understand (in my opinion) the importance of two things :
1) The base, which creates the BIR consistency (rich, smooth, juicy)
2) The oil : without adequate oil, the spices will not cook properly, and the final dish will not taste right.
Master those two, and individual variations in quantity, spices, etc., will easily follow.
** Phil.