There's no evidence linking high sodium intake to heart disease. In fact, there's more evidence suggesting that sodium intake that is too low could be far more problematic to your health. Doctors continue to parrot this myth with no scientific foundation (I have learned that doctors are not necessarily people of science).

Excellent willpower for you to give up both smoking and alcohol. I don't think I could ever give up beer, but I have nothing and no one to live for.

Weight loss is absolutely critical for your health to improve. If you lose weight then all the other measurements will improve, exercise will be easier, and your stamina will improve dramatically. Diet is far more important for weight loss than exercise. 90% of weight loss is dietary. Calorie restriction is the only way. You absolutely must lose weight. That is your #1 goal.

64oz of soda per day!? Even with sugarless soda, the acidity is going to melt your teeth away. There are no health concerns surrounding artificial sweeteners, so no worries there. They are the most studied food additives in history. Still, that's a hell of a lot of soda, but if you need it you need it...

Give up the jelly beans, it's pure sugar. Try shifting to a more plant based diet with more fiber. That will not only help you lose weight, but is positively correlated with improvements in heart disease and atherosclerosis. Even "lean meat" is around 50% fat, and it takes only 3% fat calories to store fat as fat. With complex carbohydrates, liponeogenesis (the creation of new fat from non-fat sources) has an associated calorie cost of ~30%. You are much better off eating potatoes, rice, carrots, etc, than you are eating "lean chicken breast." And throw some salt on there for flavor.

Study the "salt problem" and bring your doctor data.

Good luck.