When you have your baby you will figure it out.
They don't do much or need much at first, you feed them, change them and cuddle them. You start to learn by watching and listening to them what they need. You notice things like a little grumble followed by a high pitched wail that tells you they're hungry, or the way they move their head side to side when they're fighting sleep and tired.
Through trial and error you figure out if they burp better held over your shoulder or face down over your arm, if they prefer to sleep laying in the crib or propped up on your chest.
The first couple of weeks are all about just watching, learning and discovering your baby.
Before you know it you'll be whipping off a nappy, grabbing wipes with the other hand, somehow holding up the onesie out of the puddle of wee they've managed to make in the split second they were out of the nappy and putting a new one on, all in under 30 seconds.
The only thing I would recommend to any new mum is to go with the flow and obey your feelings. If you feel like you want to be out and about, going on walks, seeing people then do that, if you want to be left alone, to spend a couple of weeks just you, your partner and your baby at home then do that. Don't feel pressurised by people or what you believe their expectations would be.