Hello Sir Mr. Rick,
Thank you very much for your kind suggestion.
Regarding to you reply, I just have moodle account which was opened from 'moodle.org'.
I just created one new user account from that page.
But, I still have not installed moodle platform to use as a Learning Management System.
Anyway, your video in your reply is very useful and it can give me one light to continue in using Moodle.