I would have to disagree with the "kinds of food" to a certain extent, you can eat what you want and still lose weight if you have a calorie deficit. Of course if you eat junk food then you cant eat as much as it is high in calories. So it is far better to fill up with a healthyer alternative.
I would suggest to eat 3 meals a day, no snacks,(it sounds like torture but you'll be supprised at how quickly your body adjusts to this, eat your meals at a set times each day and before long your body will tell you when its meal time) weigh everything when you are cooking or preparing food and use the calorie counter to track everything you eat and drink. Do that for a few days to get a basic idea of how many calories you are consuming. From there you can adjust acordingly to create a deficit.
Another thing I would say is try to eat to your rdi. So if your rdi is 1500 then eat 1500 calories. Use the calorie counter to work out how many calories your body burns just to survive. You should aim to keep atleast a 500 calorie deficit per day.
I know this works, I have been doing this since feb and have lost weight on all but 1 of my weigh ins.
I did lots of research into different diets before taking on this type of diet. My wife is currently doing slimming world, but I find there are too many variables, I dont like the point system of weight watchers and I really dont agree with cutting things from your diet as your body needs things like carbs, protine and even fat to function properly.
Keep on keeping on. You can do it!
Life is like a oral sex, 1 slip of the tongue and your in poop!