Can't Determine Which IP to Use (Linux)

Hey there, so recently I have been trying to extend my knowledge with ethical hacking, by watching tutorials for Kali Linux keyloggers and other hacking tools (just for the sake of learning).

Whenever I try to build a keylogger for instance, I must enter my IP address (LHost), so the target's computer can communicate with mine, however, when I type ifconfig in the terminal it only shows my private IP (10.0.0.x) unlike other people who get an IP starting with 192, and whenever I go to "WhatIsMyIP" website, it displays my public IP which starts with 79, and here I'm stuck whether I should enter my public or private one (I'm using a LAN connection).

Any help would be appreciated!

Thank you for your time…