a quick and probably a silly question but really couldn't find the answer. So ok, I have already installed \[create-react-app\] via npm, but when i use npm list, it doesn't show me that, why? what would be the command-line that shows everything that I have used npm to install?
Did you use the save option when you installed?
npm install create-react-app --save
It's possible that you npm installed it somewhere different than where you are calling npm list. In that case try:
npm list -g
Depending on user you may have to sudo those commands on Linux.