Foraging for Foragers
Articles in books, print or online are helpful, but the safest and quickest way to learn some of the iffy mushrooms and wild plants is in the field from real-live experts.
At EatTheWeeds.com, one of the top teachers of foraging, Green Deane, curates a list of experts all over the country (https://bit.ly/3rbzV2I).
You can also search on Facebook or Meetup.com for mushroom hunters and wild, edible plant foragers in your state or region.