I think you're looking for a more folk magic, rootwork, conjure, hoodoo type of setting, not a Vodou setting. These practices use jar spells, packets, mojo bags, waters, sweeps, and other objects, natural or not, for spiritual purposes.
Vodou is a community Haitian religion, not a magical path. While it is a fairly open practice (based on what you are comparing it to), the one thing it takes more than anything is dedication. The spirits will not always want you for initiation, there are places in the society for the uninitiate. The Loa can even be served at home, but it is a community religion, and certain aspects of the religion will only be found by being apart of that community. And sometimes, initiation is required. Contact a sosyette, a Mambo, or Hougan to learn more about the religion, and how to be involved. One book I've been recommended to a lot, but haven't gotten around to reading it yet, was Maya Deren's Divine Horsemen .
Here is an open Facebook group:
Probe around there a bit, see what's happening.