I wonder if you actually want to do cd ~/Downloads (see ~ which refers to your home directory) . You can see what’s in / directory or in ~/ directory by using ls / or ls ~/ or just ls for seeing content of current directory.
Is there anything specific that you’re trying to do or you just want to visit downloads folder?
Downloads is the second level of directory after home or user. I did try your command. It did not give any sort of result. But thanks for the help I got it figured out.