My grandfather started smoking when he was 12. By the time he was in his 50's, he was tearing off the filters or rolling them himself.
When his lungs finally failed and he had a lung transplant, his doctor kept his lungs, encased them in clear plastic and put it on his desk as a reminder to people of what smoking can do to you. There was only a small bit of pink left, the rest was black.
The lung transplant didn't help and my grandfather still died a year later. Never even made it to 60. I was 2 when he died so I have no memory of him.
Don't take up smoking. You're only on this earth once. Spend that time enjoying life to the fullest and not taking that time for granted.