IMO ... first 6 weeks, you are in survivor mode ... get the RnP and get some sleep, deal with the transition later.
that said ... LO did great in the RnP ... he didn't love going 'flat' ... but it just took a few days and since i was well rested from the beginning, it was easier to deal with.
with a newborn, the rule is 'whatever gets you thru the night' ...