I would usually just backup from the cloud. This time, I tried using Smartswitch and found it so much simpler and faster. Withing 15-20 minutes my Note 9 looked exactly like my S9+, everything transferred, messages, pictures, settings, everything stayed the same. Only Twitter didn't install, I wonder why. I'm doing this from now on.
On day 1 I don't copy the apps via smartswitch. I prefer to go a few days on a phone without all of my personal bloatware to see how it feels. Then I add, one by one, apps that are only essential to me. It's a time to cull all of the crap.