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1 month agoAs someone who uses GrapheneOS with sandboxed GooglePlay on his only smartphone (with daily usage for years at this point): I don’t know what kind of adjustment you are referring to. I never had to adjust to anything, because I never encountered anything that GrapheneOS couldn’t do that stock Android could. Follow the installation process and after that the phone behaves like a regular phone, except you have way more options regarding security and privacy.
Is your friend trying to use GrapheneOS without any Google services maybe?
Pro tip: Get yourself a good audiobook and listen to it while walking. I regularly do extra long walks just because I want to continue listening.