Everything should work perfectly fine.
Just make sure you know which apps are not supported on GOS such as Netflix, Hulu, Cash App, etc because of the Play Integrity API. Don't be afraid to use the Play Store as well. Its treated like any other app on the system so it isn't highly privileged.
Also, one thing that was a problem for me at first was the restore solution (and backup solution). You will have to transfer your files from an external drive whether its the cloud or a local one.
Feel free to join the GrapheneOS Discord/Matrix/Telegram server and ask more questions because they're very knowledgeable people that can support you.