Looks like some photos are still updating, but overall, the domain update went pretty smooth. So smooth, that I was sure that I did something wrong.
I, finally, decided to setup email for my domain as well. Using the iCloud custom email domains for now, as I’m playing around with it and it works for me at the moment. If I need any more features out of it, then I’ll look into other services.
But for now, everything is up and running.