hey man these forums are for exchanging info so its good you have the right attitude. let me tell you what the science says on sugar, when it comes to sugar it is really horrible for your body. remember there is no such thing as refined sugar in nature. it comes from sugar cane, but then it sent off to a factory where it is heavily processed. this involves completely removing all nutrition from it including all the juices and fiber. then putting it through a rigorous processing stage and chemical addition. in the end you are left with refined sugar which rots your teeth, brain, organs and everything else in your body. it also sends your blood sugar sky high more than any human should, not to mention it is extremely addictive. your best bet is to avoid all sugar.
good carbs are good. these are natural carbs from nature not processed. raw oatmeal, fruit, sweet potatoes, and brown rice/grains. stick to those, but i would encourage you to avoid refined sugar 100%. also coke has a lot of bad shit in it. look up some videos on what coke does once it enters your body, it is extremely toxic
bottom line is trust me who was a sugar addict in my early 20's out of college, once you stop putting it in your body you will feel 1000% better and make more gains and lose more fat