I know many mamas don't want to hear this, but honestly, some BF babies do NEED to eat in the MOTN later than pediatricians sometimes recommend. You can tell this by their behavior!

When they take a good feeding, cry inconsolably when you won't feed them, and go back to sleep happy as a lark after feeding-to me, that says NEED. kwim?

You're doing great to have started EASY! One suggestion I have has to do with the falling asleep while reading you said sometimes happens. Try to do your best to get him in bed before he nods off, that way independent sleep is constantly being reinforced.