New mommy to 2!

We’ve got baby number 2 here now and I need some advice from the mommy community. My son is 2 and does great when it’s time to go down for a nap, but at bed time he’s rowdy and doesn’t want to put his diaper or jammies on for me. Also still freshly postpartum and can’t quiet pickup him to make him settle down to put his pajamas and such on him. So my question is, should I cut down his afternoon nap? He takes about 2-2 1/2 hr naps every day. Would that make him more tired for bed time? I also co sleep with him but not new baby!***