I would start with 40% carbs, 30% protein and 30% fat. That is the easiest to maintain for a long period of time in my opinion. It's what works for you though. Another option would be to do 40% carbs, 40% protein, and only 20% fat.
Or you could just eat a protein and carb at each meal. Some people love to count things... but that's not me So if you love to count then go for it. If not, eat a good carb and a lean protein at each meal and I think you'll be fine.