heel and toe is not a drifting technique, at least not to initiate a drift. heel and toe is only to match revs on a downshift, which you won't be doing in drifting because there's hardly a need for it until you're doing very high speed drifts with a changing radius.

clutch kick is the easiest to get the car to slide other than just power over, but if you're afraid of hurting the drivetrain find another hobby.