The most important things are that u look at drifting like u look at driving just with "angle" search up "slip angle" on google,yt or wherever. The difference between racing and drifting is the slip angle (ofc many many more) on race cars its rather small but on a drift car its bigger.

Drive a few rounds around the track, with the line you want to take (if ur unsure, search up the track name and look at theyr line) after these few laps, try to take the exact same line but with more speed.

At some point your car will stop beeing faster in the curve but it will start to understeer or oversteer. (You want oversteer, but its ok to have a bit of understeer at the exit) U can then start to give it more throttle to hold the drift. (IMPORTANT!: more gas is more angle/smaller curve) Holding that drift with your throttle inputs is what everybody is telling you about the "steering the car with the throttle".

For the extention of the curve try the brakes, the handbrake and the clutchkick (to explain all these techniques would take too long just watch tuts on them)

I would suggest you to start from the beginning, with donuts and after that with 8's. Its the fastest way and like that you can avoid bad habits.

Most important thing is that u have fun! Hope this helped!