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Pick up books about the paranormal and read as much as you can. Watch interviews with established paranormal investigators, and pick up shows like Ghost Hunters, Ghost Adventures, and Paranormal Investigators to get a sense for what it’s like to work as an investigator. Learn as much as you can to become familiar with the field.[2] You may want to learn about:
Ghosts and poltergeists, including the mythology and history of ghosts in each country.
Telepathy, precognition, and clairvoyance. Many mediums and fortune tellers also work also paranormal investigators.
Near-death experiences, reincarnation, and ESP (extra-sensory perception spacebar clicker).
Cryptids (creatures that may exist but aren’t documented, like the Loch Ness Monster), religion, and human psychology.