Caffeine addiction

I need help to quit drinking soda.

I've been drinking soda pretty much my whole life since no one really ever tried to stop me and it became an addiction and of mine. Im only trying to lose about 20lbs to get more toned, im not overweight but i do want to look better. The main soda im addicted to is Mountain Dew and it feels literally impossible to quit. Should I quit cold turkey?

Or do I limit myself down slowly? I've found trying to drink less and less everyday is pretty difficult as I keep forgetting or I end up drinking more and just excuse myself by thinking that it won't be that bad.. I just need some help, thank you !

(P.s I hope this is a good subreddit to ask this question, as I’ve had little to no help on other subreddits.. I’m not the best at navigating Reddit yet..)