Does anyone know how to build website with tutorial/source code as shown in the readyui? Buying this, I won't learn anything how's its made. I'm just a backend,

Does anyone know how to build website with tutorial/source code as shown in the readyui? Buying this, I won't learn anything how's its made. I'm just a backend, API guy. For the longest time, I really want to know how to make SF start up style landing page. I have done HTML/CSS tutorial, Bootstrap,SASS, React tutorial, none of them show example how to make site like > forhim.com: font, color, images > scale.com: smart shapes they use for info graphics, color gradient choice > vanta.com: colors to entire structure...