Safety is of a paramount when you are involve in any motor sports. Drifting is not what you call safe, that would be absurd, many racers are risk takers, but you don't need to put yourself in danger when trying to drift.
When you start out drifting, find a place that that has alot of space for errors, like a big parking lot or a secluded area where there's no police that comes around. You need all the space because if you do make a mistake; you'll have plenty of room to recover.
Also before you choose a car on which you will use for drifting. It's important that you realize that the car you're going to use will get damaged. So don't get emotionally attached to the car that you will be drifting because it will get damage, and don't even bother putting any bodykits because, you'll be wasting your money.
Start off with a junky car which has rear wheel driver and a manual transmission. You can use this car to polish up your skills and get better at handling it sideways. At least if you wreck the junky car that your practicing on, you won't be angry and irritated about it.
Stick with this rule and your drifting quest will be much safer and easier that way.