Nap advice 🥲

So my almost 13 month old falls asleep by himself and stays asleep for 12 hours at night. It’s amazing! But omg I cannot get him to settle himself down for his naps. And if I rock him to sleep and try to lay him in his crib there’s a 50% chance he’ll wake up while I’m doing it or he’ll only take a 30 minute nap. If I hold him or lay down with him on my bed he’ll usually take a 1 1/2 hour nap. Any advice? I’ve tried just settling him in his crib for a nap but it never works and he just ends up skipping