I highly recommend to invest in a sleep training like takingcarababies.com
I purchased the new born class when my baby was 6 weeks old and within 3 days we were down to only 1 night feeding and my baby sleeps from 7.30 pm till 4.30 am
There are a Lot of these trainings on the market and on Instagram you can find Also plenty of free content, check it out. There is the peacefullsleeper, babysleepdr and the one I like takingcarababies
I am not a promotor for these websites, Just a first time mom who got her sleep back thanks tot these tips and advice they share :)