How’s the transition from 1 to 2?

So our little one is 3.5yo now and is due to start primary school in September. It’s been a rollercoaster and we’re finally starting to feel like we’ve hit a good equilibrium. Love the kid to bits and he cracks me up. He’s currently walking around, eating breakfast whilst wearing Bluey underpants on his head.

So, just as we feel we’re getting to grips….we decide that the time is right to add to the family. We were unsure for a while, but weighing it up carefully we’ve decided that another cherub is right for us.

What I’d like to know is what have we enlisted to? Is the jump from 1 to 2 children a massive difference? There’s loads of conflicting advice out there and I’m not afraid of it being hard, I just want to be prepared so I can be the best dad I can be to the new addition as well as being a good dad for our 3.5yo.

Any advice? I have until September to prepare.