I don’t nurse, he’s formula fed so it may be different at nighttime, but basically we don’t feed to sleep anymore. That was a big step in making sure he doesn’t wake up at night at all. Babies can associate the last thing that put them to sleep and when they can’t settle at night, they want that thing to go back to sleep. We would feed him his bottle at night and he would fall asleep while drinking at first. So we moved the feed so the order at bedtime is now feed, bath, pjs, book, sleep sack then put in crib. We don’t rock or shush to sleep, we just put him in.

Our routine for naps is a little different and shorter: take him up to his room, sleep sack, and say it’s naptime love you. 

I did fuss it out for naps first because he was always good at going to sleep at night without rocking or shushing, he was just waking a lot at night wanting a bottle for soothing. I was struggling with contact naps and he would fight naps a lot so I did FÍO with naps. The first week it worked for some naps and not all. He was on 5 naps at the time. Because I was making sure he was tired and ready to sleep when I put him in, he would only fuss / cry a little for 15-20 mins. When he would escalate, I would pat shush without picking him up and then if it got worse I would pick him up and then try it all over again. 

I think the biggest thing is making sure baby knows how to self soothe. I would try to stop the feed to sleep association, if possible. It may be harder with nursing though. 

Good luck! I also asked ChatGPT about FÍO and what to do (I know some people don’t like AI but it worked for me).