I found going 0 to 1 way harder. Big adjustment. Though my circumstances and the baby's temperament were also a lot different the second time around. First was generally upset as a baby and second was generally happy. I felt a lot more confident the second time and now that they're a bit older they play with each other. My second was born during the pandemic which was nice in some ways but hard to now get them interested in doing a lot outside the house. Also harder to wrangle out in public with two because they could run in opposite directions.