If your goal is to lose fat it doesn’t matter what you eat as long as you’re in calorie deficit.

10% restriction off your personal basal metabolic rate is not too bad. But it sounds like you’re wanting a severe cut so I’d recommend 25% under your BMR. You won’t be able to keep that up forever tho only like 6 weeks. You can find BMR charts online for age/height/sex

Fat loss is a lifestyle change. Do what you can be consistent with. It’s easier to add before taking away. So adding veges and protein is easier than trying to stop eating junk food. Protein will make you feel full and veges will fill you up just from quantity if your eating a decent amount of cals of them