CIO tips or advice🙏🏼

We decided to try cio as Ferber seems to just aggravate and upset her more. Her earlier night wakes has increased (not the feeding time one) and so we feel it's time. We kinda experimented last night unintentionally and she woke, cried and was back to sleep in a a little over a half hour. Just looking for some reassurance and success. I'm very nervous as her cries kill me but I truly feel it'll be best for all.