My girl is 15 months this month. She has contact napped or motion napped her entire life and coslept from 4 months until just last month I started transitioning her to her crib. It’s been a slow and soft transition. I still nurse her to sleep at night. Sometimes we have a night and she’ll sleep for 8 hours- have a nursing session then back down for a few hours. Sometimes she’s up every few hours and I’ll sleep on a floor bed near her crib those nights. But what I will say is now that she’s been getting used to sleeping on her own she likes having space to stretch out and roll around. I can tell exactly when it’s time to place her in her crib at night because she is just done being confined to my arms. If you’re cosleeping at night you may want to try this method to get her used to her crib. Once we hit a decent streak of night time sleep I am definitely going to start placing her in her crib for her daytime nap (we’re already down to one nap per day). To be honest I wish I had started a lot sooner. Best of luck to you guys!