I am (perhaps notoriously) hesitant to talk about eating found mushrooms on steemit - but specialty food markets are a frequently overlooked way to become familiar with wildly available mushroom. For those lucky enough to live in NYC - if you want a crash course in some of the heavy hitters of wild foraged mushrooms, go to Eately. You may spend a small fortune - and you need to get lucky and find a fresh batch - but if you do you can get super familiar, up close and personal, with fresh blewits, chanterelles, morels, maitake, jelly ears and others in a safe environment. You can even treat them like wild finds if they're fresh enough, do a full evaluation with a spore print and see if you can key them out appropriately.
For the more socially isolated mushroom enthusiasts - like myself ;) - specialty food markets can provide a wealth of knowledge and experience.