When I set up my first altar I spent three weeks reading about what I was supposed to have on it. By the end I had a spreadsheet β columns for elemental representatives, directional associations, god and goddess symbols, seasonal decorations, and a section labeled "necessary tools" that listed eight separate items I did not own and could not afford. I closed the spreadsheet, went to my windowsill, put a candle on it, and decided to start there.
Here is what I know now that I wish I had known then: your altar is not a checklist. It is a living space that reflects your relationship to the sacred as it actually exists today, not as you imagine it should eventually look. The most powerful altars I have seen have been the most personal ones β a small shelf covered in objects that meant something specific to a specific person, not a store-bought arrangement of matching crystals and expensive athames.
The functional core of a Wiccan altar is quite small. You need something to represent each of the four elements: Earth, Air, Fire, and Water. A stone, a feather or incense stick, a candle, a small bowl of water β those four things and you have the elemental basis. You need a surface: a shelf, a table, a corner of your dresser. That's it to start.
Everything else grows organically. The god and goddess representations came to my altar slowly, over months, as I developed relationships with specific deities rather than the abstract divine masculine and feminine. My Book of Shadows started as a composition notebook. My wand is a stick I found on a walk that felt right in my hand β I did not buy it; I found it and asked if I could take it.
A few practical notes: keep your altar clean, not obsessively so but with intention. Dust it when you tend to it. Change flowers or natural elements before they rot. Wipe candle wax drips. The physical care of the space is itself a form of practice β it keeps your attention engaged and signals to you and to whatever you work with that this space is maintained with respect.
Start small. Start honestly. Let the altar grow with you rather than building the altar you think you should have. Three years from now it will look completely different, and that is a sign of a living practice, not an incomplete one.