Yup it's festivals and monasteries.
In terms of your game, it means religion is going to be very important, and you'll definitely want to found and enhance, spreading over all your cities with wine.
Early tech should go for calendar, and so SH may be an option if you're not on deity. Will help you get monasteries before anyone else does.
Things like GMoD may be important as well, and you'll want to get other beliefs to help you spend your faith, e.g double religious building and sacred sites, or holy warriors. If you do missionary spam with GMoD, then an interfaith dialogue / holy order combo maybe be a good way to spend the white points, especially if you got a neighbouring Ethiopia, which may otherwise put you off religion.
Piety is never mandatory, but the opener and cheaper religious stuff beliefs will be strong. I'd probably start tradition as normal (with piety opener 2nd/3rd SP if trouble getting a pantheon), then go up for cheaper monasteries and missionaries when you found which should be fairly close go when you finish tradition anyway. If you do bother filling out the rest of the tree, then Jesuit education could be very strong as a reformation, or the aforementioned sacred sites, or maybe religious fervour for great people, or untiy of the prophets to defend against AI prophet spam.
Ultimately, how the game goes depends on your situation, neighbours, your civ, and how the game goes, so there's no one VC for you. However, there are a great many ways to make the religious and cultural advantage you have work for you.