For any version of CentOS the installation steps will be same.
In below video I use CentOS 7 minimal. Which contain only cli(Command Line Interface) which is good for learning.
Download Official CentOS Linux: https://www.centos.org/download/
Download CentOS 7 which is used in video: Download Link
Completely safe to download file.
Follow the video for Installation.
For any problem mention in comment section.