Bad Habits are hard to break and good habits are hard to start.
Try to do one thing at a time: Get on a workout program and get your cardio vascular conditioning in shape for 2 weeks, before lifting one weight. Two weeks into cardio, start with 1 set-15 reps of moderate weight on each body part exercise and do a full body workout 3 times a week. The entire workout with cardio shouldn’t take longer then 1 hour 15 minutes. After 1 month pick one bad habit you have with food & soda and cut it out completely. Stick with this mind set for 3 months & stay consistent.
Tell people closest to you, so they give you support and there’s accountability, plus social pressure to stay on point. If nobody knows you won’t stick with it. Make your workout out a “good habit” and not a core. Throw away the bad habit, like it will kill you. Remember, do not start your workouts & diet at the same time or you will get overwhelmed. Do this as a lifestyle and watch your body respond.