If you want to lose weight the first thing you need to do is to find a tracker, where you can count how many calories you can eat and do eat every day. That is the first step. Then you have to adjust your snacks to the calories that you have. This means that you choose snacks that are healthier for you. If you get really interested in tracking your food intake, the next step is to start looking at the macronutrients, meaning the carbohydrates, protein and fats you eat. You'll notice that if you eat properly (=enough healthy and satisfying food) you won't need to snack so much anymore.
Good luck, let us know how you're doing!