Do you have to be a devotee of a diety t

No — nothing in tarot asks you to be devoted to a deity, to be initiated, or to commit to a practice. It asks for a question and your own attention.

A few things worth separating:

The deck itself has no theology. Tarot starts as an Italian card game (1430s), and it only became a divination tool around 1780 in France. Before that it was a game. What you hold is 22 Major Arcana (big themes, Fool through World) plus 56 Minor Arcana (day-to-day situations in four suits: wands, cups, swords, coins).

Some schools add a discipline; none of them require belief. The Rider–Waite–Smith imagery is layered with hermetic, alchemical and Christian symbols, and the Golden Dawn / Thelemic tradition treats the cards as a system you study seriously, with its own rules about how positions are read. But that's a choice of method, not a condition of using the cards. Reversals? Entirely optional — plenty of readers never use them. Spreads? A spread is just a frame of positions (past / present / future, say). One card is a complete reading on its own.

How often is entirely yours. A one-off question, a monthly check-in, a daily card — all legitimate. There's no minimum frequency in the method, and nobody has standing to tell you you're doing it wrong.

One limit, honestly stated: the cards are a symbolic system, not a mechanism, and in current scientific terms they don't predict outcomes. What they reliably do is give you a structured way to look at a decision you're already holding. A one-off works fine for that.

And the other half of your question, in case that's what you're really asking: whether this is *permitted* inside your own faith isn't something I can rule on. That judgment belongs to your community — family, or a religious authority you personally trust — and they'll weigh it better than a stranger's guess about your tradition.

Want me to try it once, as a practice pull, so you can see what one reading actually looks like from the inside?