Hello again with another asking.
As i am planning take place on Manjaro i wanna gather all must know information about Manjaro what i will have to know , have to have and what not.
all Must-have Terminal commands for updates installations and etc. after i am planning to improve my skills on linux more and more. I was using before Fedora.
Did you try searching the internet for that phrase? 
yeah searched but i prefer to learn from its official platform 
coz more compatible and trustworty. i am not trust third party sites.
u got me wrong guys. i am not lazy head guy. i not want third party sites advises. prefer to help on official platform. Official is what does makes sense. 
and i also heard that Manjaro community is high leveled friendly too
Huh?
With what? Manjaro didn’t invent these commands, they’ve been around for decades. They’ll work on any GNU/Linux distribution.
Read the official documentation for each command then.
ok sir i will do it. of course i know to read documentations. just wanted a little support from such experienced people like here u are really
Blockquote Read the official documentation for each command then.
It is.
But: the question is just too broad - not specific.
Know what you want to do.
Use the Arch wiki (or this forum here) to find out how to do it.
This is a public forum not an official platform.
What you have to know may not be the same as what I have to know, nor what another person has to know; and some things, some people should not know.
Try Linux Journey.
This pacman rosetta is quite helpful especially for users coming from debian based distros