In Arcade mode, under drift trial. Go to Dirt and Snow tracks. I think it's the 2nd track over. Chamonix. Daytime with the sun out. Pick the Suzuki 4WD 300+ HP. Pretty far over to the right.
This car will be able to get you going fast enough on the snow that you don't have to try to drift intentionally. With the right amount of speed you will be able to drift with just tapping your normal brakes. Then modulate your accelerater to keep the tires spinning and the car moving. You'll be drifting. Learn to control this first.
Entrance and exit speeds apply here too.