Stoping nursing to sleep and starting training

I’ve been trying to plan a sleep training plan for my almost 7 month old who has a strong nurse to sleep association.

She nurses to sleep every single night and still has 3 feedings a night where she really is eating a ton. I try to nurse her as much as possible all day to fill her up, but she’s been very hungry since birth (IUGR baby). I can tell when she doesn’t really need to eat based on the way she is suckling, and she’s also been doing ok settling in the middle of the night when she is not really hungry. She fusses rather than cries so I don’t nurse her.

I plan on cutting out the nursing to sleep session tonight or tomorrow night. Is it too much to start CIO or Ferber on the same night? I’ve already added in a nursing session right before bedtime routine. I’m considering having my husband do the put down pick up method, but our baby gets really upset fast if she doesn’t get nursed when she is expecting it and my husband is also likely to give up before a gentle training methods works.

TLDR: can I stop nursing to sleep and start CIO on the same night?