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.
In most programs they make the 2 keys simultainously so you don't have to seek separate buttons. The other person does the same. So there are 4 keys involved in total.

Before sending encrypted messages you two need to exchange your public keys. So each person started with 2 of their own and gained an additional 1 public key. 3 out of 4 variables are sufficient for you or the other person to read messages as the equation would have one solution which is the original message. If you exchanged public keys in plain sight you can begin encrypting messages.

In contrast for example whatsapp and dicksword which would be a medium for this conversation would have only the two public keys you both shared. 2 out of 4 keys is insufficient to read these messages because mathematically there is an infinite set potential solutions to such equation of which only one works. You can even upload your passwords encrypted with it to pastebin if you want them to be accessible from any device, but only by you. They cannot do anything other than trying all possible combinations to forcefully read it, so the longer your key - the harder it is to break into it, for this reason you have different key lengths you can select during generation and I recommend the longest.

If they got your private key or the private key of the other person - they would have 3 and would solve it as well. But they don't unless you share it explicitly (like dropping the key itself into the chat which is a pancake-forehead idiocy), so they are not able to decrypt anything. You don't have to give the intended receiver some key prior to it in secret - everything is being done in plain sight of dicksword or telegram here and now, and they can't do anything about it. No exceptions. All they know is that you hid some message and they can guess its maximum length by how long your message was - but you can always add meaningless garbage or always set a length of the message to be artificially long like 16kb to fool them, they can never see the contents though.

You can encrypt your whole system too. Anything that can be stored on the computer - can be encrypted. People who sell and buy drugs from TOR have a standard procedure they do - client orders and gives the dealer their home address in an encrypted message - so that if the server gets raided - cops got two out of four keys, one short of decryption - and so the cops would not knock to the buyer's door. In contrast if the junkie gave their home address in plain text, and the police took over the server - they would read all messages and bully morons who did not care about security. Such keys is also the default way to identify yourself and build a reputation on the dark net because nobody can impersonate you across websites. Some drug markets will refuse to let your message through if their filters detect it is unencrypted.

Image of Konata for grabbing attention.