What are some easy and reliable tips for identifying edible mushrooms?

It has been extremely tropical here lately and because of all the rain and humidity I have seen mushrooms sprouting everywhere! They’re mostly white but some markedly different from the others.
I just assume all are poisonous, but I never looked in to it and I have never eaten mushrooms not purchased at the grocery store. I have seen so many that look just like regular ‘ol button mushrooms.

Are there any ways to differentiate good from bad or is the poisonous assumption the best bet?