There is no single right answer. Each of us is different just like our choice in cars.
Try them all and work out what works. It's all a big guess anyway.
Our youngest had trouble at the start turns out breastfeeding was not possible but and underdeveloped kidney meant he got formula as well. Once we realised breastfeeding was out it took out all the anxiety (and my sleep) and he slept better.
Find a routine that works for them play, feed, sleep. Or play, sleep, feed.
Night feeds reduce stimulation. No noises lights etc.
during the day when they are asleep make noise, vacuums etc. my kids will sleep through anything.
My sister in law put her's to bed with whale sounds and we had to tip toe around, still doesn't sleep well.