32 years old smoked from about 16 - 17 years old to 31 years old. Quit about 9 months ago using an e-cig. I had quit for about a year when I was 28 - 29 and stupidly went back. I had quit with joy 510's and the first ego back then . Things have come a long way and I am confident that I will never smoke a cigarette every again!
Good luck man! It is not easy to switch. My first week was complete hell. I found that setting small goals everyday helped me more than anything. "I'm not going to smoke on the way to work" one day, "not going to smoke AT work" the next. Little steps made it easier for me to quit than trying to just make a complete swap on day 1.