How addictive coke really is?

Good morning everybody, this is my first post here (excuse my broken english, its not my mother tongue). Its been a long time since i want to try coke, but i am really taken back by all the people who say that is extremely addictive, some people even say they become addicts at the first rail. I was wondering how dangerous this really is, i was intending to buy 1g of a good fishscale coke. But i have some kind of fear becoming addicted...how managable is the recriational use? How long a g should last me? Anyone have tips for the usage? I never done it b4 so i have no tolerance + i have ADHD. Thank you for your time and have a wonderful day