Pure cardio could lose you weight, but this is best if combined with other activites especially if your aim is ot take part in specific activities like football. Throw in some circuit style training, intervals, spinning, anything you enjoy. Walking around the park dribbling a football will be good, get you moving longer than you will realise and occasionally running when you make a mistake and have to go get it back, when it comes to weight loss there is one simple rule, movement is good if it gets the blood pumping faster than at rest, the type is up to you. The most important rule I tell people when exercising is find stuff you enjoy, that way you will stick to it.
You are carrying a lot of weight for your height but as I know that is only part of the story. This is not a personal question just assessment from someone you don't need to worry about knowing, are you 75kg of muscle, fat, roughly even mix, more of one than the other? I am overweight according to every bmi chart, but strangely don't get called fat, must be the iron in my training diet.
Your lifestyle, current fitness level etc. will all have a bearing on what you can do. If you are relatively active and used to carrying that weight around you at your age you will be in a good position to do some relatively high level exercises in short time, if your version of exercise is changing channels and walking to the car, like the vast majority, the sessions will have to start with this in mind. Starting at too high a level will be dangerous, leave you immobile and usually result in you quitting, it is better to start low and build up to ridiculous than try ridiculous, fail and quit.
There are fat loss programs on here that are good a name to look for is goldfish, he puts some good generic stuff on the boards. I do some of this and can tailor to suit if there are injuries or health issues to be aware of, when I am out of my depth I say so and leave to others more knowledeable.
Diet is best kept simple and with todays world of processed food that can be more difficult than it should be. You are being smart by giving yourself months instead of weeks, now I will be pushing that a bit further and advising you to set yourself up with a diet you will be happy to have occupying 95%+ of your meals for life. This may seem ridiculous but come November keeping to safe sensible losses of 1 or two pounds, just under 1/2 to 1 kg, a week you could be 6 to 12 kg lighter than you are now and will have new goals in mind. Drastic changes to diet are generally ill advised and should only be done occasionally, so find a balanced one you can stick with and increase or decrease the overall amount without damaging balance.
If you see diets saying cut out this that and the other I would generally say avoid them, unless it's stop eating lard and sugar for snacks. Fat is not automatically your enemy, so it is ok to have some in your diet, sugar is bad in excess, you need virtually none but carbs are not all sugars and we have spent millions of years evolving for a high complex carb diet. The morons telling you to ignore this and cut out all carbs are suggesting something you will only be able to do safely for a matter of weeks and will result in you going into starvation mode and putting everything you lost back with extra, great business model for them getting repeat business lousy for anyone following these diets.
Food pyramid is a good guide for balance, please note the word guide. Look at the rough proportion, don't worry about exact numbers of portions as some show, and accept that you need to use what you have around you. If your pyramid shows pictures of bread, rice, some bananas, brocolli, a glass of milk, a fish and a cow you don't need to eat each of these in a day, especially the whole cow. Hate rice, eat pasta, hate pasta, eat potato, allergic to dairy, eat something else, the exact food it not important, the proprtion and volume are.
