Hi, speaking from my own experience...don't let your age fool you into thinking you have all the time in the world to stop drinking. I would say that if you have concerns about your drinking then now is the absolute best time to stop. There were many reasons why i wanted to stop drinking, mostly because my life had turned into a living hell.
At 24 years of age i knew i needed to stop drinking, had a check up at the doctors and my health was fine. So, i foolishy carried on drinking for another two years, by the time i did finally stop (when i was 26) i was extemley ill and it was incredibly difficult to stop by that point. Alcoholism is so progressive, and things can change so quickly. I am incredibly grateful to be sober and have never looked back, every aspect of my life is now better.