I am in same boat, I have just started to learn related to mushroom growing and how things work, I have just started to learn for education purpose as a start then want to go practically by getting mushroom.That is an amazing find. It's huge. I just put up a thread about identification but, I'm not an expert just interested. If it's dry where you are, you might want to put a drop of water on the top of the cap to encourage spores. I doubt that it is dry cause, that Oyster is huge. Not an Identification, just a educated guess?