This may be slightly different, since I'm on a different operating system, but it should be very similar on windows/osx...
Download and install PGP Client:
Generate a new key by clicking "New" or "New PGP Key"
Enter username you'd like associated with the key
(OPTIONAL) Enter an email address you'd like associated with this key)
IF USING THIS KEY FOR RC SOURCING, REMEMBER NOT TO USE ANY INFO THAT CAN LINK BACK TO YOUR RL IDENTITY
Create a strong password: - ideally this would be a password with a length of 20 characters (or more) which contains letters, numbers, symbols, capitalization, etc. - Do NOT reuse a password that you've used somewhere else, and do not use this password for other sites going forward.
RSA is fine to use as an encryption algorithm, and select the maximum key strength possible (4096 bits)
Congrats, you've generated your first key pair! I'll type up how to use a recepient's public key to encrypt a message to be sent, as well as decrypting a message you've received tomorrow, this should get you going for tonight. Let me know if there are any questions.