Losing weight is a tough stuff to do, I mean, if you want to do it - you need to be really patient.
Every body is diffirent, and every body needs and lacks something diffirent. And of course it's time consuming too. First, you should try and put all sweet stuff aside (sugar, all the sweets, chips etc) or just try to limit them in days or weeks. You don't need to put them away from day 1,just do it step by step, until you don't need to use sugar for your tee or coffee, and when you don't need to eat single piece of chocolate 😊😉 Of course, there are a lot of diffirent ways for getting sweet stuff in a healthier state, because nowaydays, there are plenty of healthier sugary stuff.
What is really important - drinking water. You should drink a lot of water, normally, a grown up person should drink about (minimum) 2litres of water. Try to avoid (again) sugary drinks like - Coke, fanta, sprite and other sweet stuff. Pure water is good for your body.
Training helps to loose weight too. Of course, you're burning your fat, and converting it with muscles. And don't be mad, if you would be earning few pounds (muscles are heavier than fat),but with the time and again, with patience you will achieve your goal.
What is really, really good to do, is to go to DIETICIAN or NUTRIONIST (I think that's the english name for it), and make some body checks. Sometimes, they will take a sample of your blood, they will analyze it, and they can tell exactly, what your body need, and what doesn't. It's really good way to start, but it's not cheap one.
That's my opinion, I was training a lot when I was between 16 and 20,and I was by Dietician, and didn't eat sugar, only water to drink, I ate a lot of stuff, mostly cooked meat.
But as I said, every human body is diffirent, and sometimes it takes a lot of effort to loose weight.
If you are interested in more you can always send me a message, and we could talk more about it, cause there are a lot of stuff more about loosing weight 😉😊