i would say don't go lower than 2200kcal/day
1st get a kitchen scale
breakfast: 5 eggs + 10 eggwhites omelet with some greens - 60g protein 25g fat
snack 1: 50g almonds - 10g protein, 6g net carbs, 20g fat
lunch: 200g ground beef + 100g cottage cheese + 1 cup of broccoli - 80g pro, 40g fat, 10g...