I'm another one who doesn't think the 'baby stage' is the easy bit! DD is 16 months now and really she just didn't like being a baby - now she's toddling about and chattering away she's like a different child. Our household is a much happier place to be.
Breast feeding comes naturally and pain free if you're lucky (straw poll from 'new mum' friends made since I had DD).
If someone says "the baby will sleep when they're tired", you have permission to slap them in the face with a vom covered muslin. Some babies need help to sleep. Likewise people using the phrase "rod for your own back". If they want to come and placate your screaming baby at 3am, by all means welcome them to spend the night, otherwise, just smile at them and take the baby into bed with you if that's what gets you all a good night's sleep.
In the early weeks/months I felt I was about a minute behind what was going on in the rest of the world. Just a bit out of sync really, and everything felt very fuggy. The tiredness is accumulative, you can't even say "oh, I'll have an early night/lie in tomorrow". Try and share the night wakings with DH if you can - get them to do at least one or two nights a week and use earplugs.
You will think you can hear the baby crying when you are grabbing a quick 3 minute shower - a whole 180 seconds to yourself. You get out covered in soap. They are fast asleep in cot. You get back into shower. Repeat.
There is a broad spectrum of "expert advice" from Put Your Baby Down to Nap at 9am Regardless of Whether They Are Tired or Not at one end of the scale to Wear Your Baby in A Sling at All Times and Never Put Them Down For Fear They Will Have Anxiety Issues Until They're 80. Your baby will more than likely fit in somewhere in the middle if you are lucky.
Trust yourself, time will give you the confidence to do this, but I found it incredibly difficult to ignore books/HV/my mum and made myself ill with worry.
Selective memory is a wonderful thing - your mum will swear you were sitting up at 3 months, crawling at 6 months, walking at 9 months and forming sentences at a year. Ignore.
Do what works for you/DH/Baby. If this is BF until they're 4 do it. If it's FF from day 1 do it. You are incredibly lucky to be living in a first world country where you have the choice.