Although I haven't had what could be called success with my spouse who has OW & doesn't want to work on the M, I can tell you that when you read some of the stories on here, you will find that what your H says is almost script.
It sounds like you did well in reading the books & skipping the begging/pleading stage which gives you an advantage.
You're right in that this is a journey & may be one of the most difficult things you've ever been thru, good to be aware of that in the beginning.
You've found a good place here with many people to offer support, encouragement, observations & their hard earned experience.
There are many thing's that you can do & although he may be the type that won't look back, you don't know that, especially when you make changes to yourself.
Right now he's newly under the spell of the affair chemicals & may not be able to see much beyond them.
Take care of yourself & your babies & keep posting & reading here.......There is always hope.