1) hopefully you got a pixel

2) biggest thing you're losing from stock android is NFC payments

3) if an app isn't working, turn this setting on

4) the default keyboard sucks. Get Gboard (turn off network and other permissions if you are concerned about privacy implications)

5) backups are different from normal Apple/Android. 12 word seed phrase + a file. Keep em secure enough and accessible enough.

6) if you find location services are really slow, turn on the GrapheneOS proxy