I am partway through a website building course and hence have a little knowledge!
We are taught to use templates for exactly the purpose you describe! That is, fill in the template with information you wish to be on every page. In its simplest form your template would have all the page buttons in the same place on each page as created in the template. If you want something different then create a new page.
Secondly if you start off with blank pages rather than the templates you talk about, then you can set for yourself where the boxes will go and their sizes, or no boxes at all if you so wish.
There are some free tutorials available on the web so I would suggest you google for a free tutorial on website building and try to learn from scratch. Otherwise most local authorities run courses on website building either during the day or evenings. It is quite simple for basic websites but you must learn the basics first!
Best of luck.