Try the substitutes like Kava for the coffee, CF sodas, herbal teas. I like clear sodas like ginger ale, soda waters like La Croix. If you stop “cold turkey” its going to be difficult to maintain. Try reducing the size of the drink until don’t miss it. Likewise, the number of servings per day should also drop. Be sure to replace with something healthy like water or flavored water, tea or clear soda. Keep yourself busy and stay away from any “trigger” situations.
Be sure to read the labels because what you think is caffeine free might not be for example Mountain Dew and most energy drink are caffeine overload.
Its going to be tough, since like other substances that end in “ine” like nicotine, the caffeine has an addictive latch on you.
Remember this group is here to support you should you need encouragement.