http://owlzyj4to3l5daq6edgsgp5z4lh4tzlnms4z6jv6xdtkily77j4b3byd.onion/beginner-guides/pgp.html
Follow the steps and create a backup key. This should have your public key in it, which you will need to copy to a .txt file. In order for someone to send you a message with PGP, they will need to have your public key. It should look like this: Before you can send encrypted messages, you must import the public key of the person you want to send the message to.