The key to getting started is to search for mushrooms that have no poisonous look-alikes or whose look-alikes are easy to identify by sight. I wouldn't try eating anything I had to ID with a microscopic exam of the spores. For fun I ID mushrooms I am pretty sure I don't want to eat just for the practice. I use David Arora's Mushrooms Demystified and take lots of pictures from all angles. I send the pics with my ID and explain why I came to my conclusion to my friend who is happy to confirm my ID. So far I have been right every time.
Female, 5'3", 50, Starting weight: 163lbs. Current weight: 135 (more or less).
I can squat 192.5lbs, press 75lbs and deadlift 210lbs