Tips on moving baby to crib after co-sleep for months!!!

Iris

My baby girl is 15 months and she been co sleep with us for about 4 months and she doesn’t want to sleep in her crib now!! She got sick and didn’t want to sleep by her self so she would only fall asleep in my arms but a couple days turned into weeks to months! We want to start moving her over but don’t know where to start!!

Please help I want to know some of your tips or tricks you have tried!! Thank you!!