Mushrooms are a very good source for proteins, phosphorus, potassium, magnesium selenium and fiber.
These nutrients are often deficient in greens or tubers.

Mushrooms get a much worse rap than they deserve.

What mushrooms lack are fats and oils, and most other wild foods lack fats and oils too.

For you to get fats you need things like nuts, some of the oil seeds like sunflower or animal sources like meat, fish, insects, grubs and other bugs.

Again, the truly and impressively dangerous ones are easy to learn, and the worthwhile ones are easy to learn too.

You should be able to learn the top 5 edible mushrooms in your area pretty easily. One field trip with the local mycological society in the spring, again in midsummer and once more in the fall would likely set you up quite nicely.