Find your Linux HOME in Windows:

• Use File Explorer.
• Browse to Users->you->AppData->Local->Packages
• Look for something that says Ubuntu, for instance

  CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc

• Look in there and see if you can find your HOME.
• Make a Windows shortcut so you can easily find it. This will be handy for downloading files into your Linux directories.