I'm struggling with loosing weight

So I'm 177 cm tall and I weigh 84 kgs. I dot think I'm fat! But I'm constantly comparing myself to other girls who are skinnier, I hav pretty big self esteem issues and I would lve to loose weight fast, I have depression and it's hard to stick to things, so I'm asking for help/advice. Is there any quick diets that I can do? Healthy or unhealthy I don't mind.
Also if any apps on te iPhone help, please share.

Apparently if you go to the doctors they can prescribe something that helps with rapid weight loss.

When you are losing weight, you should exercise and diet together.
If you exercise without dieting, you will get bigger appetite, which
will lead to increase of weight, or muscle grow
underneath the fat layer, and make you bulkier. If you diet without
exercising, you will become flabby and will have excess skin. For
diet, go wheat free. No pasta, pizza, bread and so on. And no food
after 7 p.m. People achieve marvellous results with it. Depending on
your initial weight, you can drop upwards from 20 pounds a month. If
you don't eat wheat then you don't eat all those sticky, fatty goey
cakes, you don't eat junk food, and you don't eat biscuits. But your
diet is still balanced. It costs nothing, and you do not have to
calculate points or to buy special meals or plans. For exercising,
start with walking, and then switch to running/jogging. Running is the
most efficient and calorie-burn exercise ever. If you are overweight a
lot, walk first or you may have health complications (heart attack,
disjointed bones and so on). Weight lifting is a good means to target
your problem areas for men and women. It's not necessarily to become a
bodybuilder or even join a gym - a couple of dumbbells will help you
to target your problem areas (stomach, but, legs, arms, chest).