Well, bear in mind it has been a while since I've talked to anyone about Vodou, I was always told that essentially you build a small shrine separate from the restless/unnamed dead and Lwa. At the bare minimum, it would need a glass, candle, and a Bible on the altar. I was always told water and their favorite foods would be appropriate offerings, as well as recitation of prayers and passages from the Bible. And, I was told to keep the shrine closed off for privacy.
I could be a bit off.
And, no, it's not a basic question. It's a very good question.