Which easy protection ritual suits me?

Short answer: tarot can't answer that one — there is no protection ritual in it. Tarot is a reflective reading method, not a ritual system, so I'd be making something up if I handed you a "card-based ward."

What you're asking about is folk religion, and there the customs are cheap, common, and local. A few of the easy ones people actually keep:

• A 艾草/菖蒲 or palm-leaf strip hung at the doorway (Chinese household practice, up through Qingming) — it's a seasonal boundary marker more than an apotropaic spell, and most families did it as a spring-cleaning gesture.
• A bowl of coarse salt at the threshold, changed weekly — common across Chinese folk practice and in parts of Southeast Asia; the salt is understood as drawing out what's unwanted.
• A knotted cord or 符 in a red envelope, carried or hung — the most common "easy" form of a written charm across Sinosphere households; the content is typically local, so what goes in it is not mine to compose.
• For Christians, a saint's medal or a blessing at a church door — same shape, different tradition, done on specific calendar days rather than ad hoc.

Which one *suits* you isn't a call I should make: whether a given practice is proper or even permitted is judged by your own faith community or family, not by me, and the "right" version of most of these is local — salt, palm leaf, and cord all change meaning a hundred miles over.

What I can do is draw you one card and read where you're actually unprotected right now — a reading names the situation and gives you a checkable step, which is what a ritual is standing in for anyway.

Want that single card, or would you rather I compare how these customs differ across traditions first?