Read (beginning of) https://documentation.magnolia-cms.com/display/DOCS/Magnolia+npm-cli and please follow the installation instructions until you have a running version of the Magnolia npm-cli tools
on Linux (just one one distribution )

mdrapela, please check whether you find differences in what i have written while i was using OS-X.
And also try out https://documentation.magnolia-cms.com/display/DOCS/Magnolia+npm-cli#Magnolianpm-cli-Bashautocompletion

Feel free just to edit contents - if required.
See as a mix of testing & review the sections Installation, Bash autocompletion.

Try out the commands help and create-light-module, but please do not edit the commands section of the page yet.