Watch the official drift bible - you will learn a lot from that. All techniques are explained.
(The official one shows proper technique, the LFS parody version doesn't show the correct control inputs, it's just for fun to watch)


Then practice a lot. The skid pad is good place. At the AU track.

BTW drifting with controller pad / mouse / keyboard is 100 times easier than drifting with 720 degrees steering wheel with full FFB. But then again it's 100 times more fun so BOO-YA