Keys to weight loss:
1) Eat real food, cook for yourself. VEGETABLES are your friend and are delicious. Don't forget meat, but heavy on things that come from the ground.
2) Exercise every day really hard. Like exercise as hard as you possibly can and increase effort from there for like an hour a day. Think Insanity or similar type workouts. You won't be able do much to start, but once you build strength and stamina and realize the level of couch potato you were previously at, you'll loath to ever let yourself go back.
3) Feel hungry all the time. Not starving, but your default stomach feeling should be, "i can really eat something right now". Don't eat until the next meal though. This one is less important after you've reached a weight you like, but important if you're trying to change weights.
Disclaimer: Im an engineer not a doctor, but this method was good for about ~30 lbf in 3 months for me.