I also ate pretty healthy before diagnosis, only not healthy for a diabetic. For some of us, whole grains are much better than white; for others
so far as
blood sugar is concerned, a carb is a carb is a carb. Ditto on fruit, as healthy as it is, we just can't eat too much of it.
As for your morning fasting, I don't know a lot about DP because as a Type 1 I don't experience it, my fasting numbers have always been ok even when my pp's were through the roof.