work out kcal intake. set your goal.
Adjust on app or program for tracking, eneter weight etc for food volume at each meal, and most programs should give you a break down of how much of each macro you eat.
set your ratios if need be to meet certain protein and fat needs for that day. i.e .40g/lb for fat intake, at 1-1.5g/lb for protein.
carbs make up rest to spare aminos.