When preparing for NodeJS and web development, you really need to know how to use the command line, or terminal.
How do you move directories or files around using the BASH command line? What are relative paths? What are full paths?
This video takes you deeper into understanding the terminal, or command line in Mac or Windows (note I'm using Linux on Windows but Git for Windows works, too).
This video is in-depth and runs for 60 minutes.