To spread your Civilization 6 Religion of choice, the first thing you'll need to do is acquire Faith. In fact, you'll need to continuously be acquiring large amounts of Faith throughout the course of your playthrough if you want to successfully achieve a Religious Victory, as you'll likely be spending it relentlessly on new Apostles and Missionaries to help spread the good news.
Here, we'll be taking you through all of the important mechanics surrounding Religion, Faith, Pantheons, beliefs, and more in Civilization 6, which should serve as some pretty comprehensive prep and companion detail for our dedicated Civ 6 Religious Victory guide.
If you're looking for more resource-focused Civ 6 guides, meanwhile, we also have pages on how to earn Science, how to earn Gold, and how to earn Culture and Tourism in Civ 6, too.