Naps in crib

Ka

How do I get my little one used to napping in the crib? I can get her to sleep there at night only because I rock her for 2 hours and make sure she’s dead asleep before moving her. I don’t have time to rock her for 2 hours with every nap. If I try putting her in the crib she wakes up right away. She’s so used to me holding her for naps.