Envato theme hard to transfer content and customize with existing webpage and brand

I am looking get our current content and branding from our company page: https://roboimg.com/

Here is the theme we are trying to transfer to: http://themeonstep.com/tf/artha/main/html/index.html

Here is what we have so far: http://robo.sl2.strivelocalhosting.com/

What is the most efficient way to do this if we do not know code?