Ferber method CIO help😴

For any moms who did it, how often did your baby wake up once you started? How long did you try to sleep train using this method before it either worked or you gave up with this method? Any advice you’d give someone getting ready to start it?

Don’t bother telling me how many ways CIO is going to hurt my baby. She is 6.5 months old, so she is old enough to be sleep trained and her doctor said there is no reason she shouldn’t be able to sleep for longer stretches at night. My sanity and mental health can’t handle her waking up 4-5 times a night refusing to go back to sleep unless I feed her.