Voodoo is a category of African diasporic and/or traditional religions that is usually closed to outsiders. That doesn’t mean you can’t learn about it, but those practices generally require initiation and lots of training, plus being invited in to the practice from those practitioners.
As for hoodoo, that’s a little bit different and I don’t quite have the words to describe it. You might enjoy checking out Lilith Dorsey’s work. I’ll leave a few links here for you
