I agree with the above. I studied mushrooms for ten years before I put one in my mouth. If I had a mentor that might have been quicker, but all I had were
books. As a beginner, never rely on just one book, and I agree with the process of identifying a few reliable, distinctive edible species and make these the backbone of your foraging. Twenty years on, I now have about a dozen that I can put in the "keeper" basket with impunity. It's also good to bone up on all the deadly ones, and commit these to memory as they turn up.
Until they get a lot better than they are now, beware of "apps" and such like for wild mushrooms! A brief perusal of a couple of these
led me to believe it would be far too easy to make a deadly mistake!