So this is really simple, but when I searched for it, there were no guides or anything and even saw a few people trying to buy one at some point. I didn't think that was right. Everyone should have the right to online privacy.

• Some sort of computer. (Desktop or Laptop)
  


• (Optional) Tails OS - Get it here
  


• (Optional) Flash Drive
  


• Tor Browser - Get it here
  

If you are wanting to use the tails OS for an extra layer of anonymity, load it onto a flash drive and then boot from the drive.
If you need help, select your operating system:
Mac | Windows | Linux


Now you are going to open the Tor browser and then go to [Settings-->Privacy and security]
From this point, you can set tor to "Always use private browsing mode" under the history tab.
Now set your "security level" to "Safer"



Go to the Proton mail website (Still in TOR browser)

or

Now you are going to create a free account. If you are going to make the account with false information, check out this fake name generator.


In order to verify your account, you are going to open a new tab in your tor browser and go to this website.
It should automatically have a mailbox for you to use. Copy the scrambled address and paste it as your recovery email and then you know... like... verify your account. Now you have a completely anonymous email.

Side Note: You will need to write down/copy your non-scrambled address somewhere in case you ever forget your password.