*BEGINNER* Template for landing page without header and footer and no codeing

I’m an absolute Shopware(5) beginner and I’m trying to create a template without programming knowledge which doesn’t load the header and footer but loads css code for fonts and colors. Using Designer, the next step is to load a piece of code using Code Element.

The whole thing should serve for a landing page.

I can’t find anything in the other forums and would be very grateful for a useful tip.