Did you follow a specific plan or book for your infant's schedule? Like baby whisperer or moms on call or baby wise? When did you start?

I was talking to a friend about this last night. She very strictly followed baby wise, I thin pretty much from birth, with her older son, and plans to for the next baby coming soon. Her son is a great sleeper so it worked for them, but it's not really for me. I guess I'm sort of trying to get into EASY (Eat Activitt Sleep You (except I have a toddler so may as well change You to Toddler anyway)). But I don't follow anything strictly or wake the infant at certain times. She's not quite four weeks old.

Curious if people are more like to follow some plan or guide or go with the flow.

Fwiw my older one was not a great sleeper and this baby doesn't seem to love sleeping either (as I post at 4 am!).