You can find the Terminal application through Spotlight, or navigate to Applications/Utilities/Terminal.
(that’s an l the letter, not the number 1)
Type each of these commands and hit enter:
ls
This lists all the files in your home directory:
pwd
This displays the full directory path to your current directory, which is your home directory:
cd /
This will change you into the / root directory:
ls
This lists the contents of the / root directory:
cd Users
This will change you into the Users subdirectory of the / root directory:
ls
You should see a list of all the files in /Users, including the directory for your username – your home directory:
pwd
This displays the full directory path to your current directory, /Users:
cd ..
.. means “parent directory”, so this command moved you up to the parent directory. You were in /Users, so now you are in /, the root directory:
ls
This lists the contents of the root directory, confirming where you are.
You’ve practiced using ls, pwd, and cd to navigate your computer’s filesystem from the command prompt.