It is easy. The only real additional twist of sending messages this way is pressing an encrypt/decrypt button on top of copy/paste (unless you completely automate it).

I use Kleopatra to manage my keys and messages, it has a graphical interface. Perfect for anyone. You can install a pack of tools including Kleopatra for Windows here.
https://gpg4win.org/about.html

5 minutes tutorial for any skill level on Kleopatra.
https://www.youtube.com/watch?v=lAblt1Qt_ng

Consider watching that video to simply learn that encryption requires no brain and does wonders for whenever you need it!

You are not only able to obfuscate messages this way only for people who you mean to read them, you can also verify your identity. It is called a signature. Signature works everywhere, even offline because it is purely mathematical and maths does not require internet connection. Obviously it is your self-proclaimed identity (no regsitering anything, you can append Anonymous if you wish). You can generate a working key pair even offline that without fail will always work, you can verify and decrypt everything offline. You can also encrypt your message/file with a password if you don't want to attach keys.

You could technically even print out encrypted messages or even write them by hand in real life having never had any internet connection and they would still work. If you were so stubborn you could even use paper and calculator to get a key pair and write by hand the message, then do the reverse to read incoming messages. Extremely flexible!

If I understand correctly the maths behind it goes like this
You make a private key that you should never share, and you make a public key that you can give away all you want.