I am a smoker. I wouldn't advise this. Before you get any stimulant effects. Which are minimal. You get very sick at first. By the time you have enough tolerance you are addicted physically. Some can quit easy but it can be a slippery slope. It's too risky as you don't know how hard it is to quit for you in advance.

I've tried off and on to quit for 20 years at least. Don't do it, it's a lot of work to get past the sickness. If I weren't young and ignorant, I'd have never started.