The best advice came from my parents who told me to relax and figure it out for myself. Mum said to sleep when bub slept so I had plenty of couch naps. When DS#2 came along that was a bit hard as I had 2yo jumping on me.
MIL told me that "satay sauce" poos that DS#1 was doing were abnormal. So I was worried and went to MCHN who said it was fine. MIL couldn't breastfeed so she didn't know that's how a breastfed baby poos.