Thanks to the comrade /u/nohaybanda , who told me I should go out anyway even if i did not find anything. Was fun and relaxing. Met some nice old ladies who were much better at foraging than I am.
I am going to put the parasol in a panade and fry them in fat.
I only know german ones, but you could ask on the mycology community on :reddit-logo: they seem to be more US-american. Things to look out for is that different continents have different mushrooms, and that modern books should be more auccurate.