The law in West Virginia, like the law in most states, does allow you to act completely on your own in handling these matters. And there is no set time
limit on burying a body without embalming it, first. Embalming is generally only required if a body will be transported out of state or is infected with a contagious or communicable disease and embalming the body would eliminate the risk of spreading it, which is rare.
But if you want to handle burying a body, you must make the effort to learn about the specifics of related legal controls. For example, West Virginia law requires you to keep particular records about where and when bodies are disposed of, and it also allows municipalities to impose some additional restrictions.
If you are interested in proceeding on your own, you can find a synopsis of state law requirements at the Funeral Consumers Alliance. In addition, the book Caring for Your Own Dead: Your Final Act of Love by Lisa Carlson (Upper Access Publishers) details what permits are required in each state and how to find and file them, along with providing practical information about how to proceed.