Think of it like a complete lifestyle overhaul and make small changes in your life initially. Make a diary of what you eat on a normal day before you started losing weight and target areas where you could not eat that food or that snack and not miss it, as opposed to cutting out a whole food group eg carbs which would not be sustainable.
Replace white pasta, bread and rice with brown whole meal
If you're having biscuits, instead of the whole packet or like 6, have one or two
Cut out fizzy drinks
Replace shop bought ready meals or sandwiches with home made
That kind of thing