VS code Terminal Help

I apologize if Im not using this help forum correctly as I am new to this, Ive already spent an hour just getting to this point…lol. I have A question regarding the Visual Studio Code Terminal, I downloaded it to use cloning the Ethereum-boilerplate, and I got as far as forking the repository, and Using Git clone, to install the files to my computer, I am using a you tube tutorial to walk me thru the process of what I need to be doing, and the next step was to install the dependencies. When entering command, yarn, and yarn install, the terminal doesn’t recognize the commands.
I get the following error.

PS C:\Users\tizzl\Documents\GitHub\ethereum-boilerplate> yarn install
or operable program. Check the spelling of the name, or if a path was included, verify
that the path is correct and try again.
At line:1 char:1

  • yarn install
  •   + CategoryInfo          : ObjectNotFound: (yarn:String) [], CommandNotFoundException    
      + FullyQualifiedErrorId : CommandNotFoundException
    
    

Is this a problem with the terminal settings?