How to sleep train at 13 months

Hi all! I need some advice with my one year old sleep situation. We co-sleep since the beginning but want to transition to his crib now. He doesn't know or atleast we never tried for him to fall asleep by himself. For naps, we put him to sleep and leave the room with baby monitor on. Recently he started going to daycare for almost 3 weeks but for nap time we bring him home. Today we tried to wait and see if he would sleep there. He was extremely sleepy but didn't want to sleep in the daycare. His teacher tried to pat him but that didn't help either. We brought him home and he slept immediately. What do I need now? Should I sleep train him at home first and continue to bring him home for naps? Or leave in the daycare for a few more minutes and see if he would sleep? I'm worried about the later one as he cried a lot today and didn't even attempt to stay on his bed. TIA!