Hi, it's good that you decide to lose weight and have a new life. Well once you decide, you have to keep going and going and is for long term. You should have good habit about food and exercise, change your habit everyday and keeping your new habit until you use to it.
I did that and until now I am keeping my habit, the first thing I did was keep all the healthy food in the kitchen and the fridge. So all the stuff like soda, cookies, chocolate etc. should not in your kitchen.
I also share my weight-loss plan with a friend. It is always easier when you are two people and more fun!
I Wrote down my goal on many papers with details (prefer something like “loose every week 2 pounds” to “I must eat less”) and stick it everywhere (bedroom, fridge, bathroom …).
I Drink a lot of water ( 3 L per day) and forget all kind of fast food.
I think that should be a good beginning. Good Luck !