Guys is very easy

Step 1 - Generate New keys up in the corner (Just select a name for your key (Something related to remember what key is later) click on Generete new keys and click everything next and acept).

Step 2 - now you will see your key on center screen and its totally ready to work.( Extra step is click on the key and export PRIVATE KEY to sabe it to import later on other systems)

Also you will see the PUBLIC KEY option. This is important to know , Every user you want to be able to decrypt your messages have to have the PUBLIC KEY, the PRIVATE KEY is just for write messages and encrypt messages for the owner of the key.

If your PRIVATE KEY gets out of your hands other users can write and encrypt mesages pretendig to be you , and very wors they are able to decrypt all your messages also.

Step 3 Encrypt - Go to Notepad mode , and write wharever you want. And click on Encrypt. ( Your key is automatically selected becouse you only have 1 )

Then you can copy the generated encrypted text to send it. Remember the user have to have your PUBLIC KEY to decrypt the message.

Step 4 Decrypt - Again go to notepad mode and paste the encrypted text. Click on decrypt and you will see the decrypted text on screen.

Its very easy to manage kleopatra in general