Healthy food will surely improve your living conditions the benefits are countless just focus on body fat percentage than plain out numbers on a scale. Good luck with the change :)
Eat fresh fruits, veggies, and lean meats. Variety is important so that you're getting a wide range of nutritional value plus it gets old eating the same three or four meals day in and day out. You're more likely to stick things out if you're not bored out of your skull from eating chicken, beans, and rice 24/7.