Hello everyone! Girls, tell me how you cope with children when there's…

Hello everyone! Girls, tell me how you cope with children when there's a 2-4 year age difference (specifically, the youngest newborn)? How does a day go by? How do older kids react to younger ones, how do they behave with them and generally how do they act themselves? When the eldest is 3 years old, it's interesting how this will all be, what to be prepared for. It's scary, actually. The son is also such a possessive one, jealous and generally very grumpy.