Smoking just 1 time tomorrow?

well after school im trying a smoke but i need help i dont want to smoke once or something and get cancer, i want to try it but ims cared kinda because a teacher presses a on to talk, he said he smoked 6 times only and he got cancer in his throat and they did all this **** and saved his life? is there anyway to fake smoke it? i dont want to die i have my reason ;D