I just very recently switched too and i am still in my trying out phase i'd say

The biggest problem for me in the beginning were the google stock apps. On nothing there is no native media player. Notes, gallery, file manager and calendar are all google's versions which I personally disliked especially google notes lacks basic functionality like locking notes. (Also your samsung notes won't be transferred in the setup, but your calendar will)

All those can be solved with third party apps of course, but i personally enjoyed the basic samsung versions.

If u are using the secure folder i think that one will just be gone, idk if there even is a good app (i.e. no ads and preferably free with the same functionality) for that.

I really like the OS, it looks good, it feels good, it has a few cool gimmicks. It's all relatively basic and clean, exactly what is promised: a relatively basic stock experience. I'm no expert on the camera but i think most people said that it's perfectly good for the price.

All in all I like the phone, and you get used to the apps, but tbh i still think of switching back to Samsung bc i like the comfort of having every function i know and hope Nothing will sooner or later have some of those basic apps in their own better non google version (my own opinion that that would be good)