What should I do/say if they press for "what errands"?

For calls, I plan to say counselor or pastor.

I can throw in a "needed to stretch my legs" periodically

My parents are atheism lol. When i'm pestered about why i'm sorta religious, I tell them the most obnoxious statement I've heard from church. Ex, "why are you going there to pray again?" Me; "bc jesus died for our sins, which means that like the muslims, christians should be praying x times per day, bc blah blah" and they get bored and leave me alone immediately lol.