This is great. You truly want to make a change for the better forever, and that's wonderful. Do you have any sort of food or exercise plan you're going to start? If you haven't, plan to try tracking your food in some way (calorie counting or just writing down what you eat) and if you can schedule in a small bit of exercise to start. Short walks, taking the stairs... little things
Small changes, small steps, it'll all add up!
Best of luck!