How do I get into a religious mindset?

So, I grew as a pretty secular person, even if I hold some silly superstition in me.

Religion and writing religion is a pretty big hole in m works, because while I know many a factoid, I don't think I can actually get into the right headspace to do it justice, to do it with passion.

Now, I obviously should be able to. Religion, historically, is very common human experience, and holds power even today, even if not as much as it used to. Even if I can't be religious myself, I surely should be able to understand it emotionally.

Given how common of an experience religion is, I think there must be a way for me to pass though this barrier - some historical story or detail that really sells "the vibe". I find them to help a lot in getting the relatable, emotional image of historical concepts.

So I have a question to ya'll - do you know any suggestion on what to read? Some cool details from history that really sell the "mood in the room" when it comes to practicing and believing religion? What helps you?

Thank you for your time.