Here a guide made by a fan on our discord.
complete church guide (spoilers):
ending 1 (not so good ending) visit the church anytime. then visit again after 12 hours, from 17:00 to 20:59. visit again the day after. choose to help. visit again the next day. tell FF to go to the vatican.
ending 2 (the happy ending) visit the church anytime. mention the place is rundown.. then visit again after 12 hours, from 17:00 to 20:59. ask about the pope. visit again the day after. choose to help. visit again the next day. tell FF to go to the vatican.
ending 3 (true ending) visit the church anytime. then visit again after 12 hours, from 17:00 to 20:59. visit again the day after. choose to help. visit again the next day. tell shanice to listen to FF.
ending 4 (worst ending) visit the church anytime. then visit again after 12 hours, from 17:00 to 20:59. visit again the day after. do not choose to help.
ending 5 (oblivious ending). visit the church anytime. then visit again after 12 hours, from 07:00 to 16:59.