What should I keep in mind when building

A first altar doesn't need anything rare — it needs to be *yours* and *kept*.

What actually matters

• One tradition, loosely. Pick a path you like (traditional Celtic Wicca, Hoodoo/rootwork, plain folk Catholic, plain household altar). Borrowing one piece from five traditions looks scattered and won't tell you how to tend it. There's no wrong choice here.
• One surface, low and stable. A shelf, a dresser top, a cleared corner of the table. Nothing you have to climb, nothing near a curtain, a heater, a busy doorway, or under a ceiling fan. It should survive being dusted around.
• A clean cloth and a light. A candle is fine; an LED candle is fine and is what many people start with. Matches or a lighter stay beside it, not on it.
• Four things, not forty. Something for each of earth, air, fire, water (a stone, a feather or a piece of paper, the candle, a small cup of water with a cloth under it), plus one object that names what you're actually working on — a job paper, a photo, a name written on paper. Books, crystals, statues, and extra candles can arrive later over months.
• Keep it clean and used. Water gets changed, wicks trimmed, the cloth washed, the paper replaced. An altar you never touch on its own terms is decoration.
• Nothing borrowed without asking. Family silver, a grandparent's cross, an heirloom — ask before it lives on your shelf.
• No mojo ingredients. Salt scattered on the surface, powders, dried herbs loose, broken glass — they stain, they spill, and they're hard to clean up. If a tradition calls for them, keep them in a jar off to the side and use them elsewhere.
• It can stay small. A 20×30 cm space is a real altar. So is a book of matches on a coaster.

One honest limit: this is general practice, not anyone's lineage. If you're drawn to a specific tradition, its own books will tell you things I'd only be guessing at — and the guesswork is the part worth not doing.

If it would help to have one card turned on the altar's first evening — what to focus on when you light it — I can pull a single card for that right now.