I am a child psychologist
It's virtually impossible to put a baby down to sleep. They sleep better on you. This is because for almost all of human history, a baby left alone to go to sleep would be severely in danger of being eaten by a prey animal. They are designed to seek closeness to a human and be distressed when alone. Accept this and then, if necessary, do a gentle sleep training when baby is over six months old. Use a sling and get used to transfers. A rocking seat, bouncy seat, or rocking crib helps.
Babies often feed more often than every 4 hours, they will almost certainly do so if breastfed. Cluster feeding is a thing; you will have nights where they scream constantly to be fed.
Babies can't tell the time. They don't know if it's 1am, 3am or 6:30am. You need to show them the difference by your behaviour. Keep lights and voices low in the "night" and be purposeful, breezy, chatty in the "day", open curtains etc.
A routine is useful after about 3 months because it allows you to establish earlier sleep. If you do bath, singing/story, bottle, bed, you can start that routine with baby in bed at 11pm and move the elements forward 15 min each night to a point where bath is at 6:15, and they are in bed by 7.
If you end up cosleeping (it's not advised, but many many people do it including me - again, it would have been typical in ancient human society, it's the beds we use that make it unsafe) make it as safe as possible. adult duvets low on bed and tucked in bed base. Baby in sleeping bag on top of duvet (which should be low, no higher than their legs). No pillows near baby. Never cosleep after alcohol or drugs. Baby not at edge of bed. Never, ever cosleep or fall asleep on a sofa.
Babies cannot be spoilt. They never hate their caregivers. They cry because it is their only form of communication, not because you are doing it wrong and they are angry or upset. The first couple of years are about trying hard to give your baby a secure base and to meet their needs. You are going to be their anchor. There is plenty of time to build their boats so they can go off and be independent. Babyhood is not that time. In babyhood, babies need to be held, sang to, cuddled, interacted with, loved. No cleaning, no phone notification, no TV series is more important than teaching your baby you are there for them and they can rely on you to try to help if they (baby) have a problem. That sets children up for life and provides the pattern for their future relationships. That's really all you have to do - love your baby and respond when they are upset.