Tell me about the transition from 1 to 2 kids

I’m insane but after suffering immensely with my first son for almost his whole first year of life, I think i want to have another. I always wanted 2 and i almost said nope, one and done after everything I went through. My son did not sleep more than 2 hours in a row until he was 10 months old and we moved when he was 3 months and I had horrible PPD that i left untreated too long. I quit my full time job to be a stay at home mom and I have been mostly solely responsible for the baby and got up every single time with him.

I keep thinking that surely it can’t be as hard as my first. But maybe I’m a big baby and it wasn’t actually that hard and I’m in for a real wake up call if I have another. I’m so scared but my family won’t feel complete without another member. The transition from 0-1 was SO HARD surely 1-2 can’t be worse? Or is it?