It's really not that complicated. There is no reason to count calories or make it such a chore.
If you're eating lean protein sources, fruits and veggies along with healthy fats, it really doesn't matter what you combine together.
The only thing I would be concious of is if you're eating complex carbs like bread, rice, pasta and oatmeal and combining it with too much fat (C+F). Obviously, those meals should contain P+C and low on the fat.
Otherwise, feel free to combine your fruits and veggies with any protein and healthy fat and you're good to go.
If you want to eat complex carbs, save them for the meal AFTER you workout. It's really that simple!
As for portion sizes, eat portions roughly equal to the size of your fist. If you're still hungry, eat larger portions. If you're trying to gain, eat larger portions. If you're stuffed, eat smaller portions. If you're trying to lose, eat smaller portions.
Don't complicate something that is really a pretty simple concept.
Don't eat man-made processed foods (if it comes in a box, don't eat it!) Exceptions include real oatmeal or whole-grain brown rice for certain meals.
Don't sweat the small stuff man. The goal is to eat healthy 90% of the time and be consistent with everything and give yourself time to make adjustments as needed.