Tobacco got you on a leash?
The risk is real. It can happen from the first cigarette. Nicotine is badly addictive and makes you want to smoke more. A lot of kids who smoke would like to quit but can't. Of those who try, about 40% will start again.
So think about it. Since you can't know whether you might get hooked, it's a risky choice to start. What can one cigarette hurt? Plenty. Aside from lifelong health damage, tobacco has other freaky effects.