Generally I'd advise you not to start, cigarettes aren't worth it in the long run.
You'll enjoy it for a few months, as long as you can keep the amount you smoke down. Once you get addicted though, you begin smoking so much that you no longer feel a nicotine rush, and that's when you need to think about quitting.
Most of the anti-smoking 'OMG YOU'LL GET CANCER AND DIE' is based on studies on people who smoke more than 20 cigarettes a day, and you won't even be considered a heavy smoker until you get near that limit at medical practices. It is a scare tactic, but you shouldn't take that information lightly.
In the long run, light smokers have been shown in a handful of studies to be less susceptible to upper-respiratory tract infections (colds, flu), as a result of the slightly antibiotic/antiviral qualities of nicotine smoke as well as the increased urge to cough and sneeze which protects you from those illnesses, but the downsides really do outweigh this.
Smoking is also an effective treatment for low blood pressure, however they can also CAUSE low blood pressure from extended use, leading to a physiological addiction.
Also, it's expensive as shit.