Want to lose the weight, not my mind...

Concentrate on getting one thing straight at a time, so that you don't get overwhelmed and give up.

Exercise is great for health and fitness, and can give you a buffer of extra calories to eat, but if your focus is weight loss then start with your calories and don't worry about anything else for now. If you're eating less than you burn, you will lose weight regardless of exercise.

Make sure you set a reasonable goal in MFP so that you're not cutting your calories too much - don't go for 2lbs a week if you have less than ~75lbs to lose. You can start with a much higher calorie allowance and gradually cut back if you need to as you get closer to your goal weight. (I started with 1500 and am now down to 1250 after losing 50lbs - if I'd started with 1200-1300 I never would have stuck with it! And I do hardly any exercise, so if I was active I could eat more.)

You can still eat fast food if you want it, but probably not as much or as often as you want it - you need to fit it into your calorie goal. You can either work in something a few times a week, or you can save up some calories during the week to have the food you crave at the weekend (for example). Bear in mind that although you can eat whatever you want and still lose weight so long as you're in a calorie deficit, it's still advisable to consider nutrition and satiety so think about what foods keep you feeling full for the longest time. If that burrito is going to cost you 800 calories and still leave you hungry again in a couple of hours, then maybe it's best not to have one every day... Try to get a decent amount of protein and healthy fats each day, and have a cookie after supper if you have the calories left for it.

If you're feeling hungry after every meal, then it could be that you're not choosing foods that are filling to you (for some people this is protein and/or fat, for others it's carbs - experiment to find what works for you). Or it could be that you've cut back too aggressively on your intake and you need to ease off a bit. It could even be that you're just used to eating much more and need to get used to having less. Reassure yourself that you won't starve if you don't eat until your next mealtime, and that there will still be food available later if you don't have it right now. I won't lie, it's no fun feeling hungry! But most people do start to adjust over time, and cutting back gradually on your calories can help with that adjustment too. If you really want to lose weight, I'm afraid you have to accept that you won't be able to eat like you used to and you might feel hungry at times! Finding out which foods keep you full will be really helpful. You may also find that drinking water, tea or diet soda helps; sometimes we think we're hungry when really we're thirsty instead.

So, in short, forget the exercise for now and just concentrate on getting the "calories in" side of things under control. Give yourself a month to deal with that before you start worrying about anything else - it takes time to build new habits.

Once you get the hang of that, you can start thinking about ways to add in some exercise. But just take things slowly at the start and deal with one thing at a time. Check out the stickied posts at the top of these forum sections for lots of helpful advice!