Plone barceloneta

Hello everyone
As I want to solve the issue in plone barceloneta so for this I have to run the plone barceloneta locally for solving the issue
As I am contributing first time I am unable to do that can someone please help me in this ??

As I have done this process but now I am unable to see the source code in vscode to change the code so that I can see the changes in locally host website what to do now ? As I want the code of plone barceloneta

GitHub - plone/plonetheme.barceloneta: The default theme for Plone Classic UI Github Repo

I have red that sir but i am unable to understand