Welcome, everybody here is or was new to klipper 
Why don’t you use Klipper’s original sources https://github.com/Klipper3d/klipper/blob/master/config/printer-sovol-sv01-2020.cfg?
Don’t start with a source from somwhere in the www (no offense to above mentioned author).
I would recommend always using recommended sources here https://github.com/dw-0/kiauh/blob/master/README.md.
Sineos knowledge base Knowledge Base - Klipper is always helpful.
E.g. for your problem How-To Trouble-Shoot ( Connection Problems to the Printer Board).
Why would you use a USB to uart converter in your setup. You connect your linux pc to your Creality V2.2 by USB cable. I guess USB-A to mini USB.
You got a whole lotta reading in front of you and it’s worth doing it.
Good luck, hcet14
Edit: Most important use that one
almost everything was mentioned here before.