Override theme to use protocol reactive URL for images and fonts

I’m using the Builder theme which directs all image link to http://myURL.com… and all Google fonts to http://fonts.googleapi.com… What I need to do is use a protocol reactive URL scheme with those elements so I can run a SSL and not have the http elements mixed in with https.

I am not familiar with how to do this. I am not adept with CSS or PHP altering but I could follow someone’s guidance. I am really hoping there is a way to override this, even if it involves digging deep and rendering future updates to the theme impossible due to core code changes.

If anyone can help, I will be IMMENSELY grateful. Seriously.