There are lots of different ways to construct a diet. Not every method works for everyone. That's where the trial and error part comes in.

You need to test out one method for a while, see how you do, then possibly adjust from there. It's all about learning what specifically works for YOUR body. Be sure to keep some consistent records of what you're doing and what changes, if any, are happening. And don't go just by the scale. Do measurements once every week or two (first thing in the morning for better readings).