Can someone give me health/weight advice?

Hi

I have struggled with my weight my entire life. Even when i was slim, a size 10UK i still weighed 10 stone. So i thought i was fat and of course got bullied. Since then i have put on a lot of weight and feel much worse about it. I went through periods of really starving myself when i was younger because i was so depressed about my weight.

Recently i have started using a calorie counter app on my phone. It tells u what calories and fat u eat per day etc. I have been trying to cut down more on the fat as calories are easier to burn off. I know a lot about whats healthy and whats not but i know that when it comes to somethings i will convince myself something is ok when its not.

Realistically is between 900-1100 calories a day enough? It doesnt sound like a lot but on a typical day i will eat:

Breakfast-2 slices of gluten free toast

Dinner-half a boxof grapes, a cuppa soup and 4 gluten free crackers

Tea- a small handful of plain quorn pieces, a handful of cooked mushrooms and a portion of stir fried vegetables cookedin water.

Snacks-the other half of the grapes, another cuppa soup and 4more crackers and a box of cherry tomatoes.

I do feel hungry but i figured this was because im used to much biger portions. I tend to eat okay foods, just toomuch of it in one day! Has anyone else got experiences they can share and any tips.

Ta