Ive always wanted to try it. Im scared of the whole coughing thing but I heard that if you do it right you shouldnt cough. I also dont know if its something worth experiencing.
A few times won't kill you. It's dangerous, though. People lose interest in finishing school and falling in love. Soon it's all about getting high again.
Just buy a bag, close the bathroom door, make a fire in the bathtub with it all and just sit on the toilet and inhale deeply, having a friend there might be a good idea the first time so maybe one of you will be able to find the door.