Transitioning from 1 to 2 kids

My first baby just turned 1 a couple of weeks ago, and we are now trying to have baby no.2 but to be honest im so terrified that i wont be able to cope. I dont know what changes it might bring. I am planning for 3 kids and dont want a big gap as well. Ive found a routine that works for us as a family and im just afraid that it’s not gonna be the same anymore and its just that im taking a leap of faith about how things will be. What changes did you have when it comes to bedtime, sleeping, working, feeding when you went from baby 1 to 2? Does 1 automatically wake up when the other does?