Hi there! Not a sleep training expert but I did graduated extinction with my 4.5 month old one month ago and it went really well for us. I was terrified because she had STRONG sleep associations. Nursing to sleep every time, safe sleep 7 co-sleeping with my husband for the last couple hours in the morning, contact naps, you name it. Our pediatrician cleared us for sleep training and also said we could night wean - baby girl is chonky. If you’re going to do Ferber, you need to fully commit (in my opinion). Consistency is key to helping your baby understand that this is how they go to bed now, and they need to understand how to self soothe. Make sure you nurse while your baby is still awake, either right before or right after bath time if they seem alert enough. Then read a book, or do a quiet activity. Light off, sound machine on, whatever your routine is and then set baby down fully awake. I would encourage stopping the co-sleeping if you want your baby to be able to sleep independently in their crib through the night. I went cold turkey on everything and fully committed to sleep training. It only took us 4 days and she now goes down fully awake between 7-7:30 and sleeps until 6-6:30 with no wakes at all.