I've never "done" Nutrisystem, but I've had some of the food - a fellow at work who tried and stopped gave me some of the meals. They were pretty depressing fare, and brought to mind the old joke about the eatery that always got too complaints: "The food is so bad" and "The portions are so small." The dinners were loaded with sodium and soy, IIRC.
As for losing 30-40 pounds in 82 days, if the OP is in good general health, it's doable. When I was 400 pounds, I lost 16 pounds in the first two weeks of my new lifestyle, and at least 25 the first month. I'd reached 35 pounds lost after two months. True, I was 80 pounds heavier than the OP when I started.....