I listened to go diaper free podcast on Spotify, I was going to buy the book but I’ve been doing it part time since 4 weeks old and it has been really easy for us so far. If I run into issues I will buy the book.
I have ordered Tiny potty by Andrea olson its especially for 18mo+. Have the download of go diaper free which I'm reading the 12-18mo section of at the moment!
“Peek a boo what is in your nappy” is a book quite extended in a nursery setting. Hope it helps