Naps in crib

I’m at a loss for a solution. I need to try to get my 8 week old to nap in her crib but she’s protesting hardcore. The only way I can get her to sleep in there at night is by rocking her until she’s dead asleep which usually takes a couple of hours of her fighting sleep. When I try to get her to nap I’ll put her in there when she’s just about to fall asleep and she immediately wakes up and starts wailing. I don’t let her cry for more than a few minutes without picking her up and starting all over again. I always have her swaddled, with a paci and white noise machine. Please help! I need to get her napping in a crib before she starts daycare next month.