help transitioning to crib

Emily
My son has been sleeping/napping in a swing or rock n play since birth. He is now 8 weeks and I want to attempt to transition to the crib in his room for naps to start. He seems to only be able to do about 30 mins and then he is up. Any tips for helping him Sleep longer in crib or just keep trying? If he wakes I attempt the paci and if that doesn't work I try to rock him a little bit I don't want him getting too upset so I usually end up letting him finish his nap in the swing where he is comfortable :/