And keep in mind that things can change up on you, at any given time. I ate cottage cheese and yogurt for a few months before they turned into trigger foods for me. In fact, in Maintenance, I avoid all grains and dairy other than butter and Induction cheeses. Fruits seem to be OK.
Everyone is different, though... I know of many in Maintenance that can pretty much eat from all of the rungs. This is why OWL is incredibly important... it's where you learn how to eat for the rest of your life.
I treated each new food this way - started with having it 3 days during the first week, then daily if I've had no negative reaction. Limit new foods to one at a time, too. I spent a few weeks on each rung.