Sad about how little food I can eat.

Hello everyone, I am F 158cm tall and my starting weight was 96,7kg. I’m a student so my lifestyle is mostly sedentary. I calculated that if I eat around 1350kcal I can lose a healthy amount of weight each week. This is my second week and I’ve lost about 1kg. I’m not feeling hungry often, however I’m used to massive portions and it’s hard for me to accept how many calories food has. I try to eat when I’m hungry about 2-3 meals per day. I don’t really snack, unless I’m craving it and if I do, I try to snack healthy. I’m also trying to incorporate more movement into my life, however the small portions when calorie tracking is making me feel so defeated. Yesterday I had a pretzel, a protein shake with skim milk, a salmon onigiri and a Müsli bar and a cappuccino (no sugar) and all that came up to 1000 kcal!! What the hell! I’d like to eat less calorie dense foods, but I suck at cooking and barely have time to do so. Any tips are greatly appreciated 😭