I think you can only simplify things so much without making the entire thing pointless. As others have already said, install GrapheneOS yourself — it's almost as easy as making an online purchase. And remember the phone is inherently a tracking device no matter what — especially if the cellular/radio stack is active.
I don't think there's any more shortcuts that can be taken if security and protection from surveillance are actually important.
I think you can only simplify things so much without making the entire thing pointless. As others have already said, install GrapheneOS yourself — it's almost as easy as making an online purchase. And remember the phone is inherently a tracking device no matter what — especially if the cellular/radio stack is active.
I don't think there's any more shortcuts that can be taken if security and protection from surveillance are actually important.