Alcoholism Support Group
Alcoholism is the continued consumption of alcoholic beverages, even when it is negatively affecting your health, work, relationships and life. If you think alcohol is causing you to lose control, it's time to seek help. Our group is a safe place to vent, check in, get back up if you fall, and reach sobriety.

I have friends who quit drinking and smoking at the same time. They figured, "What the heck, I am going to break my addictions and get healthy. I'm going for it."
So it depends on how you feel -- quitting soda should be fine. Quitting caffeine might give you headaches, so you can either quit now and deal with the headaches on top of any alcohol withdrawal symptoms, or hold off and continue to drink coffee, at least for now. Definitely quit soda if you can -- bothe sugarfree and regular soda is bad.
Easy does it
1-2
Coffee and soda don't do the kind of damage that alcohol do, nowhere near!
Good Luck!
Funny you mention the beverage thing, because I wanted to poll this support group to find their favorite non-alc beverage out of curiosity.
Don't think you really need to change your beverage choices too much, unless you're consuming caffeinated coffee or sodas by the gallon....
Wishing you continued success!